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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 12 pm Sunday 24 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
11.5° 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 10s primary swell from a West-northwest direction (forecast issued at 12:00pm May 24). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (24 May) | 1.5ft (0.4m) | 10s |
| Afternoon (24 May) | 1ft (0.3m) | 10s |
| Evening (24 May) | 1ft (0.3m) | 16s |
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 19°C on Sun morning, min 12°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Sun 24 | Monday 25 | Tuesday 26 | Wed 27 | |||||||||||||||||||||
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 10 | WNW 10 | WNW 10 | WNW 10 | NW 16 | NW 14 | WNW 14 | WNW 13 | WNW 13 | WNW 13 | WNW 13 | WNW 12 | NW 12 | WNW 12 | WNW 12 | NW 12 | NW 12 | WNW 11 | NW 11 | WNW 11 | WNW 10 | NW 9 | NW 11 | WNW 11 | |
34 | 19 | 19 | 19 | 61 | 211 | 250 | 225 | 222 | 219 | 209 | 190 | 147 | 187 | 187 | 205 | 195 | 157 | 119 | 99 | 92 | 70 | 90 | 44 | |
Wind (km/h) | ||||||||||||||||||||||||
off | cross-off | cross-on | cross | glassy | off | off | off | cross-off | on | on | on | on | on | on | on | on | on | on | on | on | on | glassy | cross-off | |
High Tide | 1:56PM1.08m | 2:39AM1.54m | 3:12PM1.16m | 3:37AM1.56m | 4:06PM1.27m | 4:23AM1.56m | ||||||||||||||||||
Low Tide | 8:18AM0.53m | 7:46PM0.49m | 9:24AM0.50m | 8:58PM0.48m | 10:15AM0.44m | 10:01PM0.45m | ||||||||||||||||||
 |  | |  |  | |  | | | | | | | | | | | | | | | | | | |
 | 5:05 | — | — | — | — | — | 5:03 | — | — | — | — | — | — | — | 5:01 | — | — | — | — | — | — | — | 5:01 | — |
 | — | — | — | 9:43 | — | — | — | — | — | — | — | 9:45 | — | — | — | — | — | — | — | 9:45 | — | — | — | 9:47 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 15 | 19 | 19 | 18 | 18 | 17 | 16 | 15 | 16 | 16 | 17 | 13 | 13 | 12 | 12 | 12 | 12 | 14 | 15 | 14 | 13 | 13 | 13 | 13 |
12 | 16 | 18 | 17 | 19 | 14 | 13 | 12 | 15 | 14 | 15 | 11 | 12 | 10 | 10 | 10 | 9 | 11 | 12 | 10 | 9 | 10 | 11 | 12 | |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 12 | NW 14 | WNW 14 | WNW 13 | WNW 13 | WNW 13 | WNW 13 | WNW 12 | NW 12 | WNW 12 | WNW 12 | NW 12 | NW 12 | WNW 11 | NW 11 | WNW 11 | WNW 10 | NW 9 | NW 11 | NNW 6 |
 kJ | 34 | 19 | 19 | 19 | 45 | 211 | 250 | 225 | 222 | 219 | 209 | 190 | 147 | 187 | 187 | 205 | 195 | 157 | 119 | 99 | 92 | 70 | 90 | 15 |
Swell 2 Height (m) Direction Period (s) | — | — | — | NW 16 | NW 16 | SE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 4 | — | WNW 11 |
| kJ | — | — | — | 10 | 61 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | 44 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 2 | NNE 3 | NNE 3 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 60 | 42 | 63 | 16 | 0 | 0 | 0 | 0 | 0 | 42 | 42 | 71 | 40 | 25 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 8 | 0 | 8 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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