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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 am Wednesday 13 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
8.9° C
(Which is normal for this time of year)How big are the waves at Costellos today?
The current surf forecast for Costellos at 9AM is: 0.5m 7s primary swell from a East-southeast direction and 0.3m 10s secondary swell from a East-southeast direction, 0.5m 4s secondary swell from a Southeast direction (forecast issued at 01:00am May 13). The wind direction is predicted to be onshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 May) | 1.5ft (0.5m) | 7s |
| Afternoon (13 May) | 1.5ft (0.4m) | 7s |
| Evening (13 May) | 5ft (1.6m) | 6s |
Table - waves today at Costellos. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 38mm), heaviest during Thu night. Very mild (max 16°C on Wed afternoon, min 8°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||||||
Wednesday 13 | Thursday 14 | Friday 15 | ||||||||||||||||||||||
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 | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SE 10 | SE 10 | SE 10 | ESE 7 | ESE 7 | SSE 5 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 5 | SE 6 | SE 6 | SE 6 | SE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | E 10 | ESE 10 | ESE 10 | |
28 | 27 | 27 | 19 | 19 | 37 | 172 | 161 | 106 | 74 | 83 | 167 | 156 | 182 | 434 | 486 | 503 | 531 | 672 | 947 | 919 | 818 | 763 | 612 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | on | on | cross-on | cross-on | cross | cross-off | cross | cross | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | |
High Tide | 8:39AM2.99m | 9:02PM3.29m | 9:32AM3.12m | 9:51PM3.51m | 10:25AM3.25m | 10:40PM3.71m | ||||||||||||||||||
Low Tide | 2:30AM0.74m | 2:45PM0.68m | 3:23AM0.50m | 3:35PM0.56m | 4:14AM0.27m | 4:25PM0.45m | ||||||||||||||||||
 | |  | |  | | | | | | | | |  |  |  | | | | | | | | | |
 | — | 5:22 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:55 | — | — | — | — | — | — | — | 7:58 | — | — | — | — | — | — | — | 7:59 | — | — |
— | — | — | — | 1 | — | — | — | — | — | 1 | 1 | 3 | 12 | 14 | 1 | — | 1 | 1 | 2 | 1 | — | — | — | |
Temp °C | 10 | 9 | 9 | 9 | 10 | 16 | 16 | 14 | 13 | 12 | 12 | 12 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 9 | 10 | 11 |
6 | 5 | 6 | 6 | 7 | 12 | 11 | 10 | 9 | 9 | 9 | 8 | 7 | 8 | 7 | 7 | 6 | 5 | 4 | 2 | 3 | 6 | 7 | 9 | |
Swell 1 Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | — | — | — | — | — | — | SE 12 | ESE 9 | E 10 | ESE 10 | ESE 10 |
 kJ | 27 | 26 | 27 | 19 | 19 | 15 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | — | — | — | — | — | — | 116 | 919 | 818 | 763 | 612 |
Swell 2 Height (m) Direction Period (s) | SSE 4 | SSE 4 | SE 10 | ESE 10 | ESE 10 | ESE 10 | — | — | E 12 | E 7 | — | — | — | — | — | — | — | — | — | — | SE 11 | SE 9 | SE 10 | SE 9 |
| kJ | 6 | 4 | 26 | 10 | 10 | 20 | — | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | 134 | 144 | 145 | 173 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | E 7 | E 3 | E 3 | — | — | — | — | E 13 | — | — | — | — | — | — | — | — | — | — | ESE 12 | — | — | — |
| kJ | 28 | 27 | 4 | 1 | 1 | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | 29 | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 4 | ENE 2 | SE 4 | SSE 4 | SSE 3 | SSE 5 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 5 | SE 6 | SE 6 | SE 6 | SE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | ESE 9 | — | NNE 5 | NNE 5 | — |
| kJ | 1 | 1 | 8 | 3 | 1 | 37 | 172 | 161 | 106 | 74 | 83 | 167 | 156 | 182 | 434 | 486 | 503 | 531 | 672 | 947 | — | 22 | 14 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 126 | 126 | 14 | 1608 | 1383 | 1293 | 916 | 537 | 609 | 501 | 198 | 186 | 301 | 182 | 182 | 92 | 44 | 98 | 39 | 98 | 98 | 5 | 0 | 0 |
Best forecast wave conditions in New Hampshire | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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