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Surf Forecasts:
Block Island surfForecast / Rhode Island / USA
48hr Weather and Surf, issued 12 am Monday 15 Dec 2025 ESTForecast 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
9.1° C
(Which is normal for this time of year)How big are the waves at Block Island today?
The current surf forecast for Block Island at 7AM is: 0.8m 10s primary swell from a South direction and 0.2m 9s secondary swell from a East-northeast direction (forecast issued at 12:00am December 15). An open ocean swell of 1.6m 5s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (EST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 1.5ft (0.5m) | 9s |
| Afternoon (15 Dec) | 1.5ft (0.4m) | 10s |
| Evening (15 Dec) | 1ft (0.3m) | 10s |
Table - waves today at Block Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 10 | 10 | 10 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 6 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 45 | 96 | 123 | 115 | 43 | 24 | 25 | 27 | 16 | 16 | 17 | 18 | 18 | 40 | 30 | 35 | 51 | 96 | 163 | 240 | 352 | 556 | 679 | 704 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide / height (m) | 4:33AM 0.81 | 4:48PM 0.61 | 5:18AM 0.84 | 5:33PM 0.62 | 6:00AM 0.85 | 6:14PM 0.63 | ||||||||||||||||||
Low Tide / height (m) | 10:07PM 0.08 | 11:01AM 0.09 | 10:44PM 0.08 | 11:44AM 0.07 | 11:17PM 0.06 | 12:25PM 0.05 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:05 | - | - | - |
| Sunset | - | - | - | - | - | - | 4:17 | - | - | - | - | - | - | - | 4:17 | - | - | - | - | - | - | - | 4:17 | - |
 |  | | |  | |  | | | | | | | | |  | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | -4 | -7 | -9 | -8 | -7 | -4 | -3 | -2 | -1 | 0 | -1 | -2 | -2 | -1 | -1 | -1 | 1 | 3 | 6 | 7 | 8 | 7 | 7 | 6 |
| Feels °C (?) | -16 | -18 | -21 | -19 | -18 | -15 | -14 | -11 | -10 | -9 | -11 | -11 | -10 | -9 | -8 | -9 | -8 | -8 | -4 | -3 | -3 | -4 | -4 | -5 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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