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Castlerock Surf Forecast
/ Londonderry (4 surf breaks) /
Surf Forecasts:
Castlerock surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 6 pm Sunday 31 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
12.1° C
(Which is slightly warmer than usual)How big are the waves at Castlerock today (01 Jun):
- Morning surf: Morning surf (01 Jun, local time) - 0.5ft (0.2m), 11s period with W swell.
- Afternoon surf: Afternoon surf (01 Jun, local time) - 0.5ft (0.2m), 11s period with W swell.
- Evening surf: Evening surf (01 Jun, local time) - 0.5ft (0.2m), 10s period with W swell.
The current surf forecast for Castlerock at 1AM is: 0.2m 12s primary swell from a West-northwest direction and 0.2m 6s secondary swell from a West-northwest direction (forecast issued at 06:00pm May 31). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (01 Jun) | 0.5ft (0.2m) | 11s |
| Afternoon (01 Jun) | 0.5ft (0.2m) | 11s |
| Evening (01 Jun) | 0.5ft (0.2m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 13mm), heaviest on Mon afternoon. Very mild (max 16°C on Sun afternoon, min 10°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Sun 31 | Monday 1 | Tuesday 2 | Wed 3 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
WNW 13 | WNW 12 | WNW 12 | WNW 12 | W 12 | W 12 | W 11 | W 11 | W 11 | W 11 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 11 | NW 16 | WNW 15 | WNW 14 | WNW 13 | WNW 13 | |
33 | 30 | 14 | 14 | 11 | 11 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 2 | 2 | 2 | 2 | 2 | 2 | 10 | 21 | 40 | 35 | 34 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | glassy | cross-off | cross-off | off | off | off | glassy | cross-off | glassy | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | off | off | cross-off | off | off | |
High Tide | 7:04PM1.66m | 7:15AM1.51m | 7:37PM1.67m | 7:47AM1.48m | 8:12PM1.65m | 8:19AM1.43m | ||||||||||||||||||
Low Tide | 1:02PM0.27m | 1:33AM0.32m | 1:34PM0.28m | 2:10AM0.35m | 2:07PM0.29m | 2:47AM0.40m | ||||||||||||||||||
 |  |  |  |  | | |  | |  | | |  | | | | | |  | | | | | | |
 | — | — | — | — | 4:54 | — | — | — | — | — | — | — | 4:54 | — | — | — | — | — | — | — | 4:52 | — | — | — |
 | — | 9:53 | — | — | — | — | — | — | — | 9:54 | — | — | — | — | — | — | — | 9:55 | — | — | — | — | — | 9:57 |
— | — | 1 | — | 1 | — | — | 1 | 3 | 2 | 1 | — | — | — | — | — | — | 1 | — | — | — | 1 | 2 | — | |
Temp °C | 16 | 14 | 13 | 13 | 13 | 14 | 15 | 15 | 15 | 15 | 14 | 13 | 13 | 12 | 12 | 13 | 13 | 13 | 13 | 11 | 11 | 10 | 11 | 13 |
13 | 13 | 11 | 11 | 11 | 12 | 14 | 15 | 15 | 16 | 13 | 12 | 12 | 10 | 10 | 10 | 11 | 11 | 12 | 8 | 8 | 6 | 7 | 11 | |
Swell 1 Height (m) Direction Period (s) | WNW 13 | WNW 6 | WNW 6 | WNW 6 | WNW 5 | WNW 5 | W 11 | WNW 5 | WNW 5 | W 11 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | W 10 | — | — | WNW 15 | WNW 14 | WNW 13 | WNW 13 |
 kJ | 33 | 7 | 7 | 3 | 3 | 3 | 10 | 3 | 3 | 9 | 8 | 8 | 8 | 2 | 2 | 2 | 2 | 2 | — | — | 21 | 40 | 35 | 34 |
Swell 2 Height (m) Direction Period (s) | N 8 | WNW 12 | WNW 12 | WNW 12 | W 12 | W 12 | WNW 5 | W 11 | W 11 | NW 5 | — | NW 5 | — | — | — | — | — | — | W 11 | NW 16 | WNW 4 | WNW 5 | WNW 5 | ESE 3 |
| kJ | 1 | 30 | 14 | 14 | 11 | 11 | 2 | 9 | 9 | 1 | — | 1 | — | — | — | — | — | — | 2 | 10 | 2 | 2 | 3 | 1 |
Swell 3 Height (m) Direction Period (s) | N 8 | N 8 | N 7 | N 7 | N 7 | N 7 | N 7 | — | — | N 6 | N 6 | — | — | — | — | — | W 6 | — | — | W 12 | — | — | — | W 6 |
| kJ | 1 | 1 | 1 | 1 | 1 | 1 | 1 | — | — | 1 | 1 | — | — | — | — | — | 1 | — | — | 3 | — | — | — | 1 |
Wind waves Height (m) Direction Period (s) | WNW 6 | — | — | — | — | — | — | — | — | — | W 5 | — | WNW 3 | — | NW 3 | NW 2 | NNW 2 | NNW 3 | — | — | — | — | SE 3 | — |
| kJ | 12 | — | — | — | — | — | — | — | — | — | 2 | — | 1 | — | 1 | 1 | 1 | 1 | — | — | — | — | 2 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 162 | 70 | 40 | 40 | 41 | 40 | 42 | 40 | 40 | 40 | 42 | 42 | 71 | 101 | 42 | 42 | 42 | 157 | 42 | 42 | 16 | 40 | 83 | 14 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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