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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 6 pm Wednesday 29 Apr 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
10.0° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 10PM is: 1.3m 16s primary swell from a Northwest direction (forecast issued at 06:00pm April 29). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 Apr) | - | - |
| Afternoon (29 Apr) | 3ft (0.9m) | 17s |
| Evening (29 Apr) | 4.5ft (1.3m) | 16s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 3mm), mostly falling on Fri morning. Very mild (max 15°C on Thu afternoon, min 7°C on Wed night). Winds decreasing (fresh winds from the SE on Thu morning, light winds from the SSW by Sat morning). | ||||||||||||||||||||||||
Wed 29 | Thursday 30 | Friday 1 | Sat 2 | |||||||||||||||||||||
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 | 10 AM | 1 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
NW 16 | NW 16 | NW 16 | NW 15 | NW 15 | NW 14 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | |
521 | 803 | 783 | 743 | 695 | 676 | 581 | 557 | 398 | 386 | 325 | 320 | 300 | 236 | 197 | 190 | 150 | 142 | 142 | 137 | 134 | 132 | 132 | 147 | |
Wind (km/h) | ||||||||||||||||||||||||
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 | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | |
High Tide | 5:52PM1.54m | 6:06AM1.77m | 6:22PM1.63m | 6:36AM1.75m | 6:51PM1.68m | 7:05AM1.70m | ||||||||||||||||||
Low Tide | 00:01AM0.21m | 12:32PM0.19m | 00:36AM0.19m | 12:58PM0.18m | 1:09AM0.19m | |||||||||||||||||||
 | |  | | | |  | | | |  |  | |  |  | | | | | | | | | | |
 | — | — | — | — | 5:48 | — | — | — | — | — | — | — | 5:47 | — | — | — | — | — | — | — | 5:45 | — | — | — |
 | — | 8:58 | — | — | — | — | — | — | — | 9:00 | — | — | — | — | — | — | — | 9:01 | — | — | — | — | — | 9:04 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | |
Temp °C | 13 | 13 | 12 | 9 | 8 | 7 | 10 | 13 | 14 | 15 | 13 | 12 | 10 | 10 | 9 | 11 | 14 | 15 | 13 | 11 | 9 | 9 | 11 | 13 |
7 | 9 | 9 | 4 | 3 | 2 | 4 | 6 | 8 | 11 | 10 | 8 | 6 | 6 | 5 | 8 | 12 | 14 | 10 | 8 | 6 | 6 | 8 | 11 | |
Swell 1 Height (m) Direction Period (s) | NW 16 | NW 16 | NW 16 | NW 15 | NW 15 | NW 14 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 |
 kJ | 521 | 803 | 783 | 743 | 695 | 676 | 581 | 557 | 398 | 386 | 325 | 320 | 300 | 236 | 197 | 190 | 150 | 142 | 142 | 137 | 134 | 132 | 132 | 147 |
Swell 2 Height (m) Direction Period (s) | WNW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 5 | — | — | — | — | — | — | — | — |
| kJ | 47 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WNW 12 | — | — | — | ESE 3 | E 3 | E 4 | ESE 4 | ESE 4 | ESE 4 | ESE 4 | ESE 4 | ESE 4 | ESE 5 | ESE 4 | E 3 | E 3 | ESE 3 | ESE 4 | ESE 4 | — | SSE 2 | — | — |
| kJ | 55 | — | — | — | 2 | 5 | 9 | 25 | 29 | 16 | 7 | 6 | 5 | 8 | 2 | 2 | 1 | 1 | 2 | 1 | — | 1 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 2 | 0 | 0 | 2 | 2 | 2 | 66 | 74 | 40 | 2 | 0 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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