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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 28 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
9.9° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today?
The current surf forecast for Castlerock at 5PM is: 0.3m 13s primary swell from a West-northwest direction and 0.2m 4s secondary swell from a North-northwest direction (forecast issued at 12:00pm April 28). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (28 Apr) | 0.5ft (0.1m) | 15s |
| Afternoon (28 Apr) | 0.5ft (0.2m) | 14s |
| Evening (28 Apr) | 1.5ft (0.4m) | 13s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 14°C on Thu afternoon, min 7°C on Tue night). Winds increasing (light winds from the SE on Tue night, fresh winds from the ESE by Thu morning). | ||||||||||||||||||||||||
Tue 28 | Wednesday 29 | Thursday 30 | Fri 1 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
WNW 15 | WNW 14 | WNW 13 | NW 13 | WNW 13 | WNW 13 | WNW 13 | WNW 13 | NW 18 | NW 17 | 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 | |
21 | 20 | 35 | 44 | 65 | 65 | 66 | 63 | 119 | 309 | 521 | 803 | 783 | 743 | 695 | 676 | 581 | 557 | 451 | 386 | 374 | 320 | 295 | 272 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross | cross | 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 | cross-off | |
High Tide | 5:19PM1.43m | 5:34AM1.76m | 5:52PM1.54m | 6:06AM1.77m | 6:22PM1.63m | 6:36AM1.75m | ||||||||||||||||||
Low Tide | 11:37AM0.28m | 11:24PM0.26m | 12:06PM0.22m | 00:01AM0.21m | 12:32PM0.19m | 00:36AM0.19m | ||||||||||||||||||
 | | | |  | | | | | | | | | |  |  | |  | | | |  | | | |
 | 5:54 | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:48 | — | — | — | — | — | — | — | 5:47 | — |
 | — | — | — | 8:55 | — | — | — | — | — | — | — | 8:58 | — | — | — | — | — | — | — | 9:00 | — | — | — | 9:01 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 11 | 12 | 13 | 13 | 11 | 10 | 9 | 7 | 9 | 12 | 13 | 13 | 12 | 9 | 8 | 7 | 9 | 12 | 13 | 14 | 13 | 12 | 10 | 10 |
9 | 9 | 10 | 11 | 9 | 8 | 6 | 4 | 6 | 7 | 7 | 9 | 9 | 4 | 3 | 2 | 3 | 5 | 8 | 10 | 10 | 9 | 7 | 7 | |
Swell 1 Height (m) Direction Period (s) | NNW 4 | WNW 14 | WNW 13 | NW 13 | WNW 13 | WNW 13 | WNW 13 | WNW 13 | NW 18 | NW 17 | 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 |
 kJ | 1 | 20 | 35 | 44 | 65 | 65 | 66 | 63 | 119 | 309 | 521 | 803 | 783 | 743 | 695 | 676 | 581 | 557 | 451 | 386 | 374 | 320 | 295 | 272 |
Swell 2 Height (m) Direction Period (s) | WNW 15 | N 4 | NNW 4 | N 10 | — | N 9 | N 9 | NW 20 | WNW 12 | WNW 12 | WNW 12 | — | — | — | — | — | — | — | — | — | — | — | — | ESE 5 |
| kJ | 21 | 1 | 1 | 2 | — | 2 | 2 | 16 | 50 | 57 | 56 | — | — | — | — | — | — | — | — | — | — | — | — | 4 |
Swell 3 Height (m) Direction Period (s) | N 10 | — | N 10 | W 9 | N 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | — | 2 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | N 4 | — | — | — | — | E 9 | — | N 12 | — | — | ESE 3 | E 4 | E 3 | E 4 | ESE 4 | ESE 4 | ESE 4 | ESE 4 | ESE 3 | ESE 3 | — |
| kJ | — | — | — | 2 | — | — | — | — | 2 | — | 44 | — | — | 3 | 4 | 4 | 9 | 20 | 26 | 15 | 5 | 2 | 2 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 40 | 40 | 16 | 8 | 0 | 0 | 0 | 0 | 0 | 40 | 2 | 0 | 0 | 2 | 14 | 40 | 2 | 74 | 2 | 2 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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