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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 12 am Thursday 28 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
11.8° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today (28 May):
- Morning surf: Morning surf (28 May, local time) - 0.5ft (0.2m), 6s period with NNW swell.
- Afternoon surf: Afternoon surf (28 May, local time) - 0.5ft (0.1m), 9s period with NW swell.
- Evening surf: Evening surf (28 May, local time) - 0.5ft (0.1m), 8s period with NW swell.
The current surf forecast for Castlerock at 7AM is: 0.2m 6s primary swell from a North-northwest direction and 0.1m 9s secondary swell from a Northwest direction (forecast issued at 12:00am May 28). An open ocean swell of 0.7m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (28 May) | 0.5ft (0.2m) | 6s |
| Afternoon (28 May) | 0.5ft (0.1m) | 9s |
| Evening (28 May) | 0.5ft (0.1m) | 8s |
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 21°C on Thu afternoon, min 12°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 28 | Friday 29 | Saturday 30 | ||||||||||||||||||||||
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 | 4 PM | 7 PM | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
NW 7 | NW 7 | NNW 6 | NNW 6 | NW 9 | NW 9 | NW 8 | NW 8 | NW 11 | NW 10 | NW 10 | NW 9 | NW 9 | W 8 | WNW 8 | WNW 8 | WNW 8 | NW 8 | WNW 8 | NW 7 | NW 7 | NW 7 | WNW 12 | WNW 12 | |
11 | 11 | 4 | 4 | 3 | 3 | 3 | 3 | 5 | 4 | 15 | 14 | 13 | 60 | 35 | 42 | 42 | 49 | 39 | 27 | 25 | 17 | 29 | 28 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | glassy | cross-off | off | off | off | off | cross-off | off | off | |
High Tide | 5:02AM1.56m | 5:25PM1.48m | 5:37AM1.56m | 5:59PM1.56m | 6:11AM1.55m | 6:31PM1.62m | ||||||||||||||||||
Low Tide | 10:53PM0.41m | 11:28AM0.34m | 11:38PM0.37m | 12:00PM0.30m | 00:18AM0.33m | 12:30PM0.28m | ||||||||||||||||||
 | |  |  | | | |  |  | | |  | | | | | |  | | | | | | | |
 | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:49 | — | — | — | — | — | — | — | 9:51 | — | — | — | — | — | — | — | 9:52 | — |
— | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 15 | 13 | 12 | 15 | 18 | 21 | 20 | 16 | 14 | 13 | 14 | 14 | 14 | 17 | 17 | 15 | 13 | 12 | 12 | 15 | 18 | 18 | 15 | 14 |
12 | 9 | 7 | 11 | 14 | 18 | 18 | 14 | 10 | 8 | 10 | 10 | 11 | 12 | 14 | 14 | 11 | 9 | 9 | 12 | 15 | 15 | 13 | 12 | |
Swell 1 Height (m) Direction Period (s) | NW 7 | NW 7 | NNW 6 | NNW 6 | NW 6 | NW 6 | ESE 5 | ESE 5 | ESE 5 | E 4 | WNW 8 | WNW 8 | NW 9 | NW 9 | WNW 8 | WNW 8 | WNW 8 | NW 8 | WNW 8 | NW 7 | NW 7 | NW 7 | NW 7 | WNW 12 |
 kJ | 11 | 11 | 4 | 4 | 1 | 1 | 15 | 9 | 4 | 1 | 6 | 13 | 13 | 13 | 35 | 42 | 42 | 49 | 39 | 27 | 25 | 12 | 12 | 28 |
Swell 2 Height (m) Direction Period (s) | WNW 10 | WNW 10 | NW 9 | NW 9 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 | NW 10 | NW 10 | NW 9 | W 13 | W 12 | W 12 | — | W 11 | — | — | W 16 | W 15 | ESE 3 | WNW 12 | NW 7 |
| kJ | 9 | 9 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 15 | 14 | 4 | 3 | 3 | — | 2 | — | — | 5 | 4 | 1 | 29 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | NW 6 | NW 6 | NW 11 | NW 8 | — | — | — | — | W 12 | — | — | — | — | — | — | WNW 13 | ESE 4 | ESE 4 |
| kJ | — | — | — | — | — | — | 1 | 1 | 5 | 2 | — | — | — | — | 3 | — | — | — | — | — | — | 17 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | ESE 2 | E 3 | ESE 4 | ESE 4 | ESE 4 | ESE 4 | — | — | — | S 2 | S 2 | SW 3 | W 3 | W 8 | WNW 3 | — | — | — | — | — | — | SSW 2 | — | — |
| kJ | 1 | 5 | 15 | 18 | 28 | 26 | — | — | — | 1 | 1 | 2 | 7 | 60 | 3 | — | — | — | — | — | — | 1 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 40 | 40 | 40 | 334 | 558 | 559 | 559 | 266 | 270 | 323 | 329 | 366 | 384 | 187 | 162 | 14 | 14 | 14 | 14 | 40 | 40 | 42 | 14 | 14 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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