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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 12 pm Tuesday 26 May 2026 BSTForecast update in hr min s Forecast update imminent
Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castlerock sea temperature is
11.9° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 3PM is: 0.7m 11s primary swell from a Northwest direction and 0.3m 3s secondary swell from a North direction (forecast issued at 12:00pm May 26). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (26 May) | 3ft (0.9m) | 12s |
| Afternoon (26 May) | 2.5ft (0.7m) | 11s |
| Evening (26 May) | 2.5ft (0.7m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Thu night. Warm (max 20°C on Thu afternoon, min 9°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Tue 26 | Wednesday 27 | Thursday 28 | Fri 29 | |||||||||||||||||||||
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 | 10 PM | 1 AM | 4 AM | 7 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
NW 12 | NW 11 | WNW 11 | WNW 11 | WNW 10 | WNW 9 | WNW 11 | WNW 11 | NNW 7 | WNW 10 | NNW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 6 | NNW 6 | NNW 6 | NW 9 | NW 8 | NW 8 | NW 11 | NW 10 | NW 10 | |
199 | 179 | 103 | 99 | 69 | 58 | 44 | 37 | 27 | 21 | 19 | 12 | 12 | 11 | 11 | 6 | 4 | 4 | 3 | 3 | 3 | 5 | 4 | 15 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | on | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | off | |
High Tide | 4:06PM1.27m | 4:23AM1.56m | 4:49PM1.38m | 5:02AM1.56m | 5:25PM1.48m | 5:37AM1.56m | ||||||||||||||||||
Low Tide | 10:15AM0.44m | 10:01PM0.45m | 10:55AM0.39m | 10:53PM0.41m | 11:28AM0.34m | 11:38PM0.37m | ||||||||||||||||||
 |  | | |  | | | |  | | | | | | | | | | | | |  |  | | |
 | 5:01 | — | — | — | — | — | 5:01 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — |
 | — | — | — | 9:45 | — | — | — | — | — | — | — | 9:47 | — | — | — | — | — | — | — | 9:49 | — | — | — | 9:51 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | |
Temp °C | 12 | 12 | 12 | 11 | 10 | 9 | 10 | 11 | 14 | 17 | 17 | 17 | 16 | 15 | 13 | 11 | 13 | 17 | 19 | 20 | 17 | 14 | 13 | 14 |
8 | 7 | 7 | 6 | 7 | 6 | 9 | 9 | 12 | 14 | 13 | 14 | 14 | 11 | 9 | 7 | 8 | 13 | 17 | 19 | 16 | 14 | 12 | 11 | |
Swell 1 Height (m) Direction Period (s) | NW 12 | NW 11 | WNW 11 | WNW 11 | WNW 10 | WNW 9 | N 5 | N 5 | NNW 7 | NNW 7 | NNW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 6 | NNW 6 | NNW 6 | NW 6 | NW 8 | NW 8 | ESE 5 | E 4 | NW 10 |
 kJ | 199 | 179 | 103 | 99 | 69 | 58 | 15 | 11 | 27 | 21 | 19 | 12 | 12 | 11 | 11 | 6 | 4 | 4 | 1 | 3 | 3 | 4 | 1 | 15 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | N 4 | N 4 | WNW 11 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | NW 9 | NW 9 | NW 9 | NW 9 | NW 6 | NW 6 | NW 8 | NW 10 | E 4 |
| kJ | — | — | — | — | 5 | 9 | 44 | 37 | 20 | 20 | 10 | 10 | 9 | 9 | 9 | 3 | 3 | 3 | 3 | 1 | 1 | 3 | 4 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | NNE 4 | — | NW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 11 | NW 8 | NW 7 |
| kJ | — | — | — | — | — | 4 | — | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | — | N 3 | N 3 | N 3 | — | — | — | — | — | E 3 | E 3 | ESE 3 | ESE 3 | ESE 2 | ESE 3 | ESE 4 | ESE 4 | ESE 4 | ESE 4 | ESE 5 | ESE 5 | — | — | — |
| kJ | — | 1 | 1 | 2 | — | — | — | — | — | 1 | 3 | 3 | 2 | 1 | 3 | 10 | 13 | 17 | 15 | 12 | 9 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 71 | 71 | 71 | 114 | 71 | 71 | 79 | 40 | 0 | 14 | 14 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 334 | 405 | 354 | 172 | 40 | 83 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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