Snow-ForecastSnow-ForecastMountain-ForecastMountain-ForecastTide-ForecastTide-ForecastWeather-ForecastWeather-Forecast
Search by country, region, or break
Search by country, region, or break

Quick Links

Surf Forecasts:

Block Island surfForecast / Rhode Island / USA

information circle12 Day Weather and Surf, issued 7 pm Thursday 18 Sep 2025 EDT
Forecast update in hr  min  s Forecast update imminent
Block Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Block Island sea temperature is
19.7° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Block Island this week:

The surf forecast for Block Island over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 22) at 8AM. The primary swell is predicted to be 0.8m and 11s period with a secondary swell of 0.7m and 6s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Block Island in the next 12 days are 1.4m 12s and forecast to arrive on Tuesday (Sep 23) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Wednesday (Sep 24) at 8PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Mon 22nd Sep)2.5ft (0.8m) 11s
Best Surf 8AM (Mon 22nd Sep)2.5ft (0.8m) 11s
Most Powerful11AM (Tue 23rd Sep)4.5ft (1.4m) 12s

Table - best surf conditions forecast for Block Island over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Mostly dry. Warm (max 24°C on Fri afternoon, min 15°C on Sun morning). Winds increasing (light winds from the W on Fri morning, fresh winds from the NE by Sat morning).

Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Tue afternoon, min 15°C on Sun night). Wind will be generally light.

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thu
25
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
1
1
0
0
1
1
1
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.7
SE
0.5
ESE
0.4
ESE
0.3
SE
1.1
E
0.8
E
0.9
ESE
0.5
SE
0.6
SE
0.7
SE
1.1
SE
1.2
SE
1.3
SE
1.4
SE
1.4
SE
1.2
SE
1
SE
0.9
SE
0.7
SE
0.5
ESE
0.7
E
Period(s) (?)87795551312111111101212111010989
Wave
Graph
(?)Metric surfscale
Energy kJ (?)5727191354333084118123258326327546546332192137834179
Wind
(km/h)
25
W
5
W
20
WSW
25
NNE
25
ENE
25
ESE
15
ESE
25
E
20
E
10
E
15
ENE
5
SSE
20
SW
25
WSW
20
WSW
20
NW
20
NE
25
ENE
10
ENE
10
E
15
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		crosscross-
off		crosscross-
on		cross-
on		crosscross-
on		crosscrossoncross-
on		crosscrosscross-
off		cross-
off		crosscrosscross-
on		on
High Tide
/ height (m)
6:50AM
0.91
7:10PM
0.94
7:34AM
0.95
7:51PM
0.93
8:14AM
0.98
8:30PM
0.91
8:52AM
1.00
9:07PM
0.87
9:27AM
0.99
9:41PM
0.83
10:01AM
0.97
10:13PM
0.78
10:34AM
0.93
Low Tide
/ height (m)
12:58AM
0.04
1:03PM
0.07
1:36AM
0.03
1:46PM
0.05
2:09AM
0.04
2:25PM
0.05
2:35AM
0.05
3:00PM
0.05
2:54AM
0.07
3:34PM
0.06
3:11AM
0.09
4:07PM
0.10
3:35AM
0.12
4:41PM
0.14
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thu
25
Sunrise-6:30--6:31--6:31--6:33--6:33--6:35--6:35-
Sunset--6:49--6:46--6:45--6:44--6:42--6:39--6:38
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
Rain (mm)
---------------------
Temp. °C212124231717161616151617182023221920181617
Feels °C (?)192121201213111011111518161821211616141416
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for Rhode Island

  1. weather stationWind Update Still cross-shore at Block Island (moderate winds from the WSW at Block Island Airport 3 km from Block Island). 0.6m 7s swell from the ESE to make surfable waves.

    2 hours 37 minutes ago Block Island
Expand
<
>
View all

2 h 37 min ago

20 km/h
WSW
Cross-Shore
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Block Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Block Island at:
surf-forecast.com

Information about the Block Island Surf forecast

The above surf forecast table for Block Island provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Block Island can be found by selecting the local surf guide option on the grey menu. Our Block Island surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Block Island) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Block Island may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Block Island is 33 km (20 miles) from Westerly. If you plan a vacation in Rhode Island, look for hotels and other accommodation in Westerly. Westerly has rooms for a wide range of budgets as well as car hire and transport links.

Nearest
Nearest
Nearest