Block Island, Rhode Island Weather Conditions

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Current Conditions

  • 75°
  • Clear
  • Wind: SSW 16 mph
  • Humidity: 78%
  • Visibility: 10.0 miles
  • Dew Point: 68°
  • Pressure: 29.85 in. -

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Next 12 Hours

5  pm
8  pm
11  pm
2  am
5  am
Clear
Clear
Partly Cloudy
Partly Cloudy
Thunderstorm
T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
73°
72°
70°
70°
70°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Partly Cloudy
  • High: 77 °
  • Low: 70 °
  • Partly Cloudy
  • Thursday
  • Chance of a Thunderstorm
  • High: 77 °
  • Low: 64 °
  • Chance of T-Storms
  • Friday
  • Partly Cloudy
  • High: 75 °
  • Low: 66 °
  • Partly Cloudy
  • Saturday
  • Partly Cloudy
  • High: 75 °
  • Low: 68 °
  • Partly Cloudy
  • Sunday
  • Chance of a Thunderstorm
  • High: 77 °
  • Low: 70 °
  • Chance of T-Storms

Forecast for Block Island, Rhode Island

Updated: 5:00 PM EDT on July 23, 2014

  • Wednesday

    Partly cloudy in the morning, then clear. High of 77F. Breezy. Winds from the SSW at 15 to 20 mph.

  • Wednesday Night

    Mostly cloudy with thunderstorms and rain showers, then a chance of a thunderstorm and rain showers after midnight. Low of 70F. Breezy. Winds from the SW at 10 to 20 mph. Chance of rain 60%.

  • Thursday

    Overcast with a chance of a thunderstorm and rain showers, then a chance of a thunderstorm and a chance of rain in the afternoon. High of 77F. Winds from the NNW at 5 to 10 mph. Chance of rain 60%.

  • Thursday Night

    Mostly cloudy with a chance of rain in the evening, then overcast. Low of 64F. Winds from the NNE at 5 to 10 mph. Chance of rain 20%.

  • Friday

    Overcast in the morning, then clear. High of 75F. Winds from the NNE at 5 to 15 mph shifting to the SSW in the afternoon.

  • Friday Night

    Partly cloudy. Fog overnight. Low of 66F. Winds from the SW at 5 to 10 mph.

  • Saturday

    Partly cloudy. High of 75F. Winds from the SW at 10 to 15 mph.

  • Saturday Night

    Clear. Low of 68F. Breezy. Winds from the SSW at 15 to 20 mph.

  • Sunday

    Overcast with a chance of a thunderstorm and rain in the morning, then partly cloudy with a chance of a thunderstorm and rain. High of 77F. Breezy. Winds from the SSW at 15 to 25 mph. Chance of rain 50%.

  • Sunday Night

    Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 70F. Breezy. Winds from the SW at 15 to 20 mph. Chance of rain 70% with rainfall amounts near 0.5 in. possible.

  • Monday

    Partly cloudy with a chance of a thunderstorm. High of 77F. Breezy. Winds from the SSW at 20 to 25 mph. Chance of rain 50%.

  • Monday Night

    Clear. Low of 68F. Breezy. Winds from the WSW at 10 to 20 mph.

  • Tuesday

    Partly cloudy. High of 77F. Winds from the WSW at 10 to 15 mph.

  • Tuesday Night

    Partly cloudy. Low of 66F. Winds from the WSW at 10 to 15 mph shifting to the NNW after midnight.

  • Wednesday

    Partly cloudy. High of 73F. Winds from the West at 10 to 15 mph.

  • Wednesday Night

    Partly cloudy. Low of 64F. Winds from the WSW at 5 to 15 mph.

  • Thursday

    Partly cloudy. High of 73F. Winds less than 5 mph.

  • Thursday Night

    Partly cloudy. Low of 64F. Winds less than 5 mph.

  • Friday

    Partly cloudy. High of 73F. Winds less than 5 mph.

  • Friday Night

    Mostly cloudy. Fog overnight. Low of 64F. Winds less than 5 mph.

  • Saturday

    Mostly cloudy with a chance of a thunderstorm. High of 73F. Winds less than 5 mph. Chance of rain 40%.

  • Saturday Night

    Mostly cloudy. Fog overnight. Low of 64F. Winds less than 5 mph.

  • Sunday

    Clear. High of 73F. Winds less than 5 mph.

  • Sunday Night

    Clear. Low of 64F. Winds from the SSW at 10 to 15 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Champlins Road - near Coast Guard, Block Island, RI

Updated: 5:33 PM EDT

Temperature: 76.8 °F Dew Point: 72 °F Humidity: 85% Wind: SSW at 7.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: West Beach Quonnie, Quonochontaug, RI

Updated: 5:17 PM EDT

Temperature: 72.7 °F Dew Point: 69 °F Humidity: 89% Wind: North at 7.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: Quonnie, Charlestown, RI

Updated: 5:33 PM EDT

Temperature: 72.2 °F Dew Point: 69 °F Humidity: 89% Wind: North at 10.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: RAWS NINIGRET RI US, Wakefield, RI

Updated: 4:25 PM EDT

Temperature: 76 °F Dew Point: 70 °F Humidity: 83% Wind: SSW at 9 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 77 °F Graphs

Location: Near Charlestown Beach, Charlestown, RI

Updated: 5:21 PM EDT

Temperature: 73.6 °F Dew Point: 73 °F Humidity: 97% Wind: WSW at 4.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: the Breeze, Charlestown, RI

Updated: 5:33 PM EDT

Temperature: 78.8 °F Dew Point: 70 °F Humidity: 74% Wind: North at 4.5 mph Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Snug Harbor, RI, Wakefield, RI

Updated: 5:32 PM EDT

Temperature: 73.4 °F Dew Point: 70 °F Humidity: 90% Wind: SW at 9.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: Westerly, RI

Updated: 5:24 PM EDT

Temperature: 73.8 °F Dew Point: 69 °F Humidity: 86% Wind: SW at 7.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Pasquiset Pond, Charlestown, RI

Updated: 5:27 PM EDT

Temperature: 77.9 °F Dew Point: 69 °F Humidity: 74% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Shannock Rd, Charlestown, RI

Updated: 5:33 PM EDT

Temperature: 76.8 °F Dew Point: 72 °F Humidity: 84% Wind: SSW at 2.7 mph Pressure: 29.74 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: Stone Cove Marina, Wakefield, RI

Updated: 5:33 PM EDT

Temperature: 74.5 °F Dew Point: 71 °F Humidity: 90% Wind: West at 9.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Fishers Island, Fishers Islandd, NY

Updated: 5:20 PM EDT

Temperature: 76.1 °F Dew Point: -32 °F Humidity: - Wind: SSE at 3.0 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: Bonnet Shores Beach Club, Narragansett, RI

Updated: 5:33 PM EDT

Temperature: 75.6 °F Dew Point: 71 °F Humidity: 85% Wind: SSW at 14.1 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Canonchet Woods, Hopkinton, RI

Updated: 5:32 PM EDT

Temperature: 81.1 °F Dew Point: 69 °F Humidity: 67% Wind: SE at 6.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Masons Island Marina, Stonington, CT

Updated: 5:33 PM EDT

Temperature: 78.8 °F Dew Point: 70 °F Humidity: 74% Wind: Calm Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Hawks Nest Point, Fishers Island, NY

Updated: 5:33 PM EDT

Temperature: 83.1 °F Dew Point: 71 °F Humidity: 67% Wind: South at 9.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Richmond, Richmond, RI

Updated: 5:33 PM EDT

Temperature: 78.7 °F Dew Point: 70 °F Humidity: 74% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Noank, Noank, CT

Updated: 5:33 PM EDT

Temperature: 84.7 °F Dew Point: 76 °F Humidity: 75% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Taunton Massachusetts 
418 PM EDT Wednesday Jul 23 2014 


Synopsis... 
a cold front will approach the region tonight triggering scattered 
showers and thunderstorms. A few strong thunderstorms are 
possible west of the central hills. Showers will likely linger 
into Thursday southeast of the Boston to Providence corridor. High 
pressure builds with drier weather for Friday and Saturday. An 
approaching warm front Sunday will bring more humid unsettled 
weather for the early part of next week. 


&& 


Near term /until 6 am Thursday morning/... 


* a few strong to severe storms possible late this afternoon into 
the evening hours * 


415 PM meso-update... 


Continuing to monitor for the potential for strong to severe 
thunderstorms late this afternoon into the evening hours. 
Currently the cold front has just pushed through Ithaca New York up to 
Montpelier Vermont...and will continue a eastward progression towards 
southern New England through the remainder of the day. Over the 
next few hours...believe a few isolated showers and thunderstorms 
will pop- up /just like they are in Mohawk Valley region/. Then 
expect a more broken line segment to move through by the evening 
hours as the front moves closer to the region. 


Looking at Storm Prediction Center mesoscale analysis...sb cape values have reached to 2500 
j/kg with not much in the terms of effective shear for southern New 
England. Rap 0-6 km bulk shear values have increased 
slightly...and are now 15-20 kts. As of 20z...the stronger wind 
shear and upper level jet dynamics are still situated across 
upstate New York which is also where the deep layer moisture is 
located per the k-index. Hence why the storms are sustaining 
themselves. 


Overview and into tonight... 


A cold front will pass across the northeast early this evening and 
into the early overnight hours. Although we are currently lacking 
moisture and shear as mentioned above...rap guidance shows that 
both of these parameters will increase closer to 00z. Therefore 
believe that showers and stronger thunderstorms will develop and 
overspread the region as the front pushes closer to southern New 
England. 


Throughout the evening hours...the main concern is the amount of 
instability with lack of solar heating by the late evening hours. 
Current thinking though is that since the atmosphere has not been 
worked over and the guidance shows linger elevated instability 
overnight believe that the thunderstorm potential will linger until 
about midnight. By then the storms will enter the the eastern 
portion of the area which is being influenced by the advecting 
maritime air from todays gusty southwest winds. 


Still cannot rule out the potential for severe weather but have 
increasing confidence that at least strong storms will develop late 
this afternoon into the evening hours. After discussing with Storm Prediction Center 
decided to issue a watch for the locations that have the best 
potential to see the best moisture/instability and shear overlapping 
one another. The main threats are damaging winds and localized 
flooding as precipitable waters  continue to increase above 1.8 inches. 


&& 


Short term /6 am Thursday morning through 6 PM Thursday/... 


Thursday... 


Cold front will slow down during its passage across southern New 
England Thursday morning. Both the ec and NAM show a wave developing 
along the front allowing for the slow down while the GFS seems to be 
the outlier on pushing the front though by 12z. In fact the upper 
level trough axis is still across upstate New York by 12/15z resulting in 
clouds and the confidence that precipitation will linger especially for areas 
south and east of the bos-pvd corridor. Believe that by 00z the 
front and the bulk of the precipitation will be offshore but cannot rule 
out a few lingering showers especially for the cape and the islands. 
Because of the slow down and the potential wave 
development...cant rule out the potential for embedded 
thunderstorms during the day. 


Drier air will work its way in behind the front resulting in a 
cooler day with highs well below average and close to 15 degrees 
cooler then today. Aside from the clouds and lingering precipitation 
chances...should be a pleasant day. 


&& 


Long term /Thursday night through Wednesday/... 


*/ highlights... 


- dry and seasonable into Friday 
- return of warm and muggier conditions for Saturday 
- significant weather Saturday night into early next week 
- a return of dry and seasonable weather by midweek 


*/ overview and model preference... 


Surprising pattern as we close out the month of July! As present northwest 
Pacific impulse ejects east it couples with an upper-level low parked 
over NE Canada resulting in trough enhancement through the Great 
Lakes region. Subsequent downstream ridging over the North-Atlantic and 
ridge strengthening over the west-Continental U.S. Ahead of a Pacific impulse 
bottled in the Gulf of Alaska...the atmospheric pattern buckles. 
With the stagnant pattern in place...anomalous conditions prevail as 
decent agreement among ensemble members signal a -3 to -4 South Dakota in 
heights/temperature/humidity. 


But a note of caution: similar ensemble members out to d8 and into 
early August are exhibiting considerable spread within nao/pna 
trends. It is with no certainty as to how this pattern will evolve. 
This makes the forecast over the NE-Continental U.S. Difficult further out in 
time as New England especially finds itself within the east-periphery 
of the aforementioned trough. Just a slight wobble of the overall 
buckled pattern east or west can result in considerable changes in the 
forecast. 


Feel the decent agreement between deterministic and ensemble members 
warrants a blend of model guidance towards the forecast. Will hit on 
the main points along with any preferred guidance in the dailies 
below. 


*/ Day-to-day details... 


Thursday night through Saturday... 


Thinking a dry forecast period with the rrq of the upper-level jet 
shifting southeast. Feel the cold front and attendant wave low will remain 
over the waters. Showers dissipating /if any/ towards midnight as 
dynamics are shunted out of the region. 


Otherwise...high pressure and light northwest-flow sweeps across New 
England Friday /sea-breezes along the shores/ followed by return 
breezy S/SW-flow for the remainder of the period as the high slides 
east/southeast and low pressure begins to build in from the west. Seasonable weather 
initially...but expect the return of warmer/muggier conditions by 
Saturday. Looking clear for Friday...diurnal cumulus for Saturday. 


Saturday night into early next week... 


The evolution of the trough and the proximity of its east-periphery are 
Keys to the forecast /as is the offshore enhacing ridge across the North- 
Atlantic/. The track timing and morphology of individual impulses 
through the cyclonic flow will ultimately determine the potential 
outcomes for the region. 


For Saturday night into Sunday...seemingly an initial impulse is a 
focus for convective activity /perhaps a mesoscale convective system/ where thermal/moist 
axes and subsequent instability converge at the surface and along 
the nose of a low level jet rear of an attendant warm-front. The more zonal 
regime advects this activity W-to-E. Nearly Uni-directional shear 
presents a threat of damaging wind. But early in time and likely 
abundance of cloud cover...threat may be limited. Hints of middle-level 
drying and wake subsidence? Just a huge mess. May be looking at more 
widespread stratiform with embedded thunderstorms. Who knows...just 
a first guess. Biggest concern is the plume of precipitable waters  exceeding 1.5 
inches and a possible risk of flash flooding. Some confidence of 
that at least. 


Into Monday...the low deepens as it occludes over the Great Lakes. 
Along and ahead of the cold front within warm/muggy/unstable 
conditions...convection is likely within an environment of deep- 
layer forcing...but it is just too early to go into detail. Many 
questions as to whether the environment will destabilize beneath 
strong SW-NE Uni-directional shear. Appears activity may occur in 
the morning once again followed by middle-level drying and subsidence. 
Yeesh. Again...lots of uncertainty. Only confidence is with surging 
precipitable waters  in excess of 2-inches conintuing the possible risk of flash 
flooding. 


A final note...evaluating the 23.0z and 23.12z cips analogs...both 
ping upon potential convective threats Sunday and Monday. The 
probabilities of severe weather impacts have slightly increased with 
the 23.12z analogs /up to 70-percent/. So while the above discussion 
contains a fair amount of uncertainty...the forecast still warrants 
close monitoring. 


At some point the cold front should push east behind which drier and 
cooler air wrapping into the occulusion should prevail resulting in 
seasonable conditions for the region. Whether this occurs on Tuesday 
or Wednesday...just too uncertain. 


&& 


Aviation /20z Wednesday through Monday/... 
forecaster confidence levels... 


Low...less than 30 percent. 
Moderate...30 to 60 percent. 
High...greater than 60 percent. 


Short term /through Thursday/... 


Generally moderate confidence on forecast. 


Through 22z...generally VFR. 


After 22z into tonight...MVFR ceilings and visibilities in vicinity of scattered 
thunderstorms ahead of a cold front. A few thunderstorms may briefly lower 
ceilings/visibilities to IFR levels. Also...a few thunderstorms and rain may produce strong 
wind gusts. There is also a moderate potential for IFR ceilings 
forming tonight across the cape and islands. 


Thursday...generally MVFR ceilings and visibilities to start in anticipated 
rain or showers. Conditions will be improving from northwest to southeast 
through much of the day. Except along and southeast of a pym-uuu line 
which may stay in lower clouds through much of 
Thursday...improving late. 


Kbos taf...high confidence. VFR through most of the day. Thunderstorms 
possible after 00z to the north and west of bos and closer to the airfield 
itself by 03z. 


Kbdl taf...high confidence in taf. Thunderstorms possible after 22z. Any 
thunderstorms could contain strong wind gusts. 


Outlook...Thursday night through Monday... 


Thursday night through Saturday...high confidence. 


VFR. -Ra moves out Thursday night under northwest flow. Light winds and 
mostly clear on Friday /sea-breezes along the shores/. Scattered-broken 5 kft 
ceilings Saturday with breezy S/SW winds. 


Saturday night through Monday...low confidence. 


Periods of ra/tsra. Mix of MVFR-IFR conditions...worst of which 
anticipated during overnight periods and +ra. Continued blustery 
S/SW winds. 




&& 


Marine... 
forecaster confidence levels... 


Low...less than 30 percent. 
Moderate...30 to 60 percent. 
High...greater than 60 percent. 


Short term /through Thursday/...moderate confidence. 


The SW flow will strengthen ahead of a cold front to produce gusts 
approaching 25 knots across many of the near shore waters...thereforesca 
is still in effect. Seas may approach 5 feet east of Cape Ann this 
evening. Otherwise will need to monitor for areas of fog that may 
develop along the south coastal waters tonight. 


Outlook...Thursday night through Monday... 


Thursday night through Saturday...high confidence. 


Tranquil boating weather. Some showers may linger along the southeast outer- 
waters Thursday night...but should be good after midnight. High 
pressure and light northwest-flow Friday /sea-breezes along the shores/. 
Winds veer S/SW overnight and become breezy during the day Saturday. 


Saturday night through Monday...low confidence. 


Weather turning sour. Increase S/SW winds ahead of a strong low over 
the Great Lakes region will result in significant wave heights over 
the S-waters especially. Showers/thunderstorms anticipated some of 
which could be strong. 


&& 


Box watches/warnings/advisories... 
CT...none. 
Massachusetts...none. 
New Hampshire...none. 
Rhode Island...none. 
Marine...Small Craft Advisory until 8 PM EDT this evening for 
anz230>237-251. 
Small Craft Advisory until 8 am EDT Thursday for anz250-254. 


&& 


$$ 
Synopsis...dunten/sipprell 
near term...dunten/sipprell 
short term...dunten 
long term...sipprell 
aviation...dunten/sipprell 
marine...dunten/sipprell 






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