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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 1 pm Saturday 09 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
8.8° C
(Which is slightly warmer than usual)How big are the waves at Costellos today?
The current surf forecast for Costellos at 5PM is: 0.6m 9s primary swell from a East direction and 0.5m 7s secondary swell from a Southeast direction, 0.6m 4s secondary swell from a South-southeast direction (forecast issued at 01:00pm May 09). The wind direction is predicted to be onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (09 May) | 2.5ft (0.8m) | 9s |
| Afternoon (09 May) | 2.5ft (0.7m) | 9s |
| Evening (09 May) | 4.5ft (1.3m) | 6s |
Table - waves today at Costellos. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 18mm), heaviest on Sat night. Warm (max 20°C on Sun afternoon, min 7°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Sat 9 | Sunday 10 | Monday 11 | Tue 12 | |||||||||||||||||||||
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 | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 9 | ESE 9 | E 9 | SSE 5 | SSE 6 | SSE 6 | SSE 7 | SSE 7 | SE 7 | SE 6 | SE 6 | ESE 8 | ESE 8 | ESE 8 | SE 8 | SE 8 | SE 10 | SE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | |
86 | 84 | 57 | 78 | 155 | 123 | 198 | 154 | 100 | 64 | 68 | 87 | 87 | 90 | 109 | 86 | 213 | 238 | 184 | 217 | 217 | 165 | 136 | 93 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | on | on | cross-on | cross | cross-off | cross | cross-off | off | cross-off | off | off | off | off | cross-off | cross-off | off | cross-off | cross | off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 5:44PM2.66m | 5:52AM2.80m | 6:35PM2.74m | 6:48AM2.81m | 7:25PM2.88m | 7:44AM2.88m | ||||||||||||||||||
Low Tide | 11:27AM0.91m | 11:43PM1.18m | 12:16PM0.91m | 00:40AM1.10m | 1:06PM0.87m | 1:36AM0.94m | ||||||||||||||||||
 | | |  |  |  |  |  |  |  |  |  | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 5:26 | — | — | — | — | — | — | — | 5:24 | — | — | — | — | — | — | — | 5:22 | — |
 | — | — | 7:52 | — | — | — | — | — | — | — | 7:52 | — | — | — | — | — | — | — | 7:53 | — | — | — | — | 7:54 |
1 | 3 | 5 | 8 | 1 | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 8 | 8 | 9 | 10 | 12 | 11 | 12 | 13 | 15 | 17 | 20 | 16 | 12 | 11 | 9 | 10 | 13 | 15 | 15 | 13 | 9 | 8 | 7 | 8 |
6 | 5 | 7 | 9 | 9 | 8 | 11 | 11 | 13 | 15 | 17 | 12 | 8 | 7 | 5 | 6 | 9 | 11 | 10 | 10 | 5 | 4 | 2 | 3 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | E 9 | E 9 | E 9 | E 9 | SSE 6 | SSE 7 | SE 7 | SE 6 | SE 6 | ESE 8 | ESE 8 | ESE 8 | SE 8 | SE 8 | SE 10 | SE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 |
 kJ | 86 | 84 | 57 | 57 | 55 | 39 | 126 | 154 | 100 | 64 | 68 | 87 | 87 | 90 | 109 | 78 | 213 | 238 | 184 | 217 | 217 | 165 | 136 | 93 |
Swell 2 Height (m) Direction Period (s) | SSE 7 | SE 11 | SE 7 | E 13 | SE 11 | SE 10 | E 9 | E 9 | E 8 | E 9 | E 8 | SSE 7 | SE 8 | SSE 8 | ESE 8 | E 8 | E 9 | E 8 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SE 14 | SE 14 |
| kJ | 5 | 5 | 22 | 4 | 5 | 4 | 39 | 41 | 37 | 39 | 35 | 64 | 59 | 55 | 90 | 86 | 74 | 32 | 57 | 10 | 10 | 10 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | — | E 13 | SE 11 | E 17 | E 13 | E 13 | SE 13 | E 13 | SE 11 | ESE 11 | SE 11 | E 16 | E 16 | SE 10 | SE 11 | SE 10 | — | ESE 10 | E 15 | SE 14 | SE 14 | SE 14 | — | — |
| kJ | — | 4 | 5 | 6 | 3 | 3 | 7 | 3 | 5 | 12 | 19 | 5 | 5 | 36 | 31 | 50 | — | 56 | 4 | 8 | 8 | 8 | — | — |
Wind waves Height (m) Direction Period (s) | SSE 7 | SE 7 | SSE 4 | SSE 5 | SSE 6 | SSE 6 | SSE 7 | — | — | — | — | — | — | — | NNW 2 | — | — | — | SSE 3 | S 3 | — | NW 2 | NW 2 | NW 2 |
| kJ | 16 | 12 | 10 | 78 | 155 | 123 | 198 | — | — | — | — | — | — | — | 1 | — | — | — | 6 | 6 | — | 1 | 1 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 198 | 60 | 364 | 14 | 198 | 0 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 123 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in New Hampshire | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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