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Costellos Surf Forecast
/ New Hampshire (9 breaks) / New Hampshire (9 breaks) /
Surf Forecasts:
Costellos surfForecast / New Hampshire / USA
48hr Weather and Surf, issued 7 am Sunday 31 May 2026 EDTForecast update in hr min s Forecast update imminent
Costellos surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Costellos sea temperature is
13.3° C
(Which is 1.9°C warmer than normal for this time of year)How big are the waves at Costellos today (31 May):
- Morning surf: Morning surf (31 May, local time) - 3.5ft (1.1m), 7s period with E swell.
- Afternoon surf: Afternoon surf (31 May, local time) - 3.5ft (1.1m), 9s period with E swell.
- Evening surf: Evening surf (31 May, local time) - 3.5ft (1.1m), 8s period with E swell.
The current surf forecast for Costellos at 1PM is: 1.1m 8s primary swell from a East direction and 0.5m 8s secondary swell from a East direction (forecast issued at 07:00am May 31). The wind direction is predicted to be offshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 May) | 3.5ft (1.1m) | 7s |
| Afternoon (31 May) | 3.5ft (1.1m) | 9s |
| Evening (31 May) | 3.5ft (1.1m) | 8s |
Table - waves today at Costellos. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 4mm), mostly falling on Sun afternoon. Very mild (max 19°C on Tue afternoon, min 9°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Sunday 31 | Monday 1 | Tuesday 2 | Wed 3 | |||||||||||||||||||||
5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
E 8 | E 7 | E 7 | E 9 | E 9 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 9 | |
186 | 127 | 92 | 186 | 186 | 177 | 173 | 173 | 169 | 111 | 86 | 138 | 146 | 122 | 119 | 90 | 86 | 68 | 68 | 51 | 38 | 40 | 26 | 27 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | cross-off | cross-off | glassy | cross-off | off | cross-off | cross | cross-on | cross-on | on | cross-on | cross | cross-off | cross-off | off | off | glassy | cross | cross | cross-off | cross-off | cross | |
High Tide | 12:06PM2.95m | 00:08AM3.31m | 12:47PM2.94m | 00:49AM3.29m | 1:28PM2.91m | 1:30AM3.24m | ||||||||||||||||||
Low Tide | 5:55AM0.47m | 5:58PM0.84m | 6:36AM0.47m | 6:39PM0.86m | 7:17AM0.49m | 7:20PM0.89m | ||||||||||||||||||
 |  | |  |  | | | |  | | | |  | | | | | | | | | | | | |
 | 5:07 | — | — | — | — | — | — | — | 5:07 | — | — | — | — | — | — | — | 5:05 | — | — | — | — | — | — | 5:05 |
 | — | — | — | — | — | 8:14 | — | — | — | — | — | — | — | 8:15 | — | — | — | — | — | — | — | 8:15 | — | 8:15 |
— | — | — | — | 2 | 1 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 8 | 11 | 17 | 16 | 14 | 12 | 11 | 9 | 9 | 9 | 9 | 10 | 12 | 12 | 12 | 11 | 11 | 12 | 18 | 19 | 18 | 18 | 17 | 15 |
4 | 7 | 14 | 13 | 13 | 10 | 9 | 7 | 6 | 4 | 5 | 7 | 9 | 9 | 9 | 8 | 8 | 9 | 16 | 16 | 14 | 16 | 13 | 11 | |
Swell 1 Height (m) Direction Period (s) | E 8 | E 7 | E 7 | E 9 | E 9 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | S 4 | E 9 |
 kJ | 186 | 127 | 92 | 186 | 186 | 177 | 173 | 173 | 169 | 111 | 86 | 138 | 146 | 122 | 119 | 90 | 86 | 68 | 68 | 51 | 38 | 40 | 8 | 27 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | E 8 | — | — | E 15 | — | — | — | — | — | — | — | — | — | — | — | — | SE 9 | SE 9 | SE 9 | SE 9 | E 9 | SSE 4 |
| kJ | 27 | 41 | 34 | — | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 3 | 3 | 3 | 26 | 3 |
Swell 3 Height (m) Direction Period (s) | S 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 9 | SSE 8 |
| kJ | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 7 |
Wind waves Height (m) Direction Period (s) | — | WNW 2 | — | — | — | S 2 | — | — | — | E 4 | E 4 | — | — | — | — | — | — | — | SW 2 | SSE 3 | S 4 | S 4 | — | — |
| kJ | — | 1 | — | — | — | 1 | — | — | — | 16 | 17 | — | — | — | — | — | — | — | 1 | 2 | 18 | 16 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 39 | 98 | 39 | 39 | 14 | 0 | 0 | 0 | 0 | 0 | 1290 | 92 | 0 | 83 | 123 |
Best forecast wave conditions in New Hampshire | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wind Speed (km/h)
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Ocean Swells (m)- Wind Speed (km/h)
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