Surf Forecasts:
Castlerock surf forecast from 11 Nov 2026:
- Best quality surf: Thursday 19 Nov, 9PM (local time) - 2.5ft (0.8m), 12s period, WNW swell with offshore winds.
- Most powerful swell: Tuesday 24 Nov, 12PM (local time) - 10ft (3.0m), 11s period, NW swell with 2,014 kJ wave energy.
- Next surfable swell (1★+): Friday 13 Nov, 9AM (local time) - 2.5ft (0.8m), 8s period with NNW swell.
Best Forecast Surf Conditions for Castlerock this week:
The surf forecast for Castlerock over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Nov 13) at 9AM. The primary swell is predicted to be 0.8m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Castlerock in the next 16 days are 3.0m 11s and forecast to arrive on Tuesday (Nov 24) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 7s period and expected on Sunday (Nov 22) at 12PM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 13th Nov) | 2.5ft (0.8m) 8s |
| Best Surf | 9PM (Thu 19th Nov) | 2.5ft (0.8m) 12s |
| Most Powerful | 12PM (Tue 24th Nov) | 10ft (3.0m) 11s |
Table - best surf conditions forecast for Castlerock over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 10°C on Wed night, min 7°C on Tue night). Winds increasing (calm on Tue night, fresh winds from the N by Wed night). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Mon afternoon. Very mild (max 13°C on Mon afternoon, min 4°C on Fri night). Winds increasing (light winds from the S on Sat night, near gales from the SE by Mon morning). | ||||||||||||||||||
Wednesday 11 | Thursday 12 | Friday 13 | Saturday 14 | Sunday 15 | Monday 16 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | NW 9 | WNW 9 | NNW 5 | N 6 | NNW 7 | NNW 8 | NNW 9 | NNW 8 | NNW 8 | NNW 6 | NNW 8 | NW 8 | NNW 10 | N 15 | NNW 14 | NNW 13 | NW 9 | NW 8 | NW 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 12 | 8 | 25 | 127 | 191 | 186 | 211 | 80 | 58 | 12 | 50 | 50 | 164 | 168 | 301 | 58 | 39 | 28 | 14 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | on | on | on | cross-on | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off |
High Tide | 6:37AM1.73m | 6:49PM1.55m | 7:09AM1.69m | 7:19PM1.46m | 7:43AM1.62m | 7:50PM1.36m | 8:21AM1.52m | 8:23PM1.26m | 9:05AM1.42m | 9:02PM1.17m | 10:02AM1.33m | 9:56PM1.08m | |||||||
Low Tide | 00:33AM0.21m | 1:02PM0.26m | 1:02AM0.26m | 1:38PM0.35m | 1:32AM0.32m | 2:16PM0.46m | 2:05AM0.39m | 3:00PM0.58m | 2:43AM0.47m | 3:57PM0.68m | 3:34AM0.54m | 5:11PM0.74m | |||||||
 |  |  | | | | |  | | | | |  | | | |  |  |  | |
 | — | 7:50 | — | — | 7:52 | — | — | 7:54 | — | — | 7:56 | — | — | 7:58 | — | — | 8:00 | — | — |
 | — | — | 4:30 | — | — | 4:28 | — | — | 4:27 | — | — | 4:24 | — | — | 4:22 | — | — | 4:22 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 8 | 2 |
Temp °C | 8 | 9 | 9 | 10 | 9 | 9 | 8 | 8 | 8 | 5 | 7 | 8 | 7 | 8 | 9 | 8 | 11 | 13 | 11 |
Feels °C | 4 | 4 | 3 | 2 | 3 | 2 | 3 | 4 | 4 | 0 | 2 | 3 | 3 | 3 | 4 | 1 | 0 | 8 | 3 |
Swell 1 Height (m) Direction Period (s) | NW 9 | NNW 6 | NW 8 | — | — | NNW 13 | NNW 9 | NNW 8 | NNW 8 | NNW 6 | NNW 8 | NW 8 | NNW 10 | NW 9 | NNW 14 | NNW 9 | NW 9 | NW 8 | E 6 |
| kJ | 12 | 8 | 3 | — | — | 33 | 211 | 80 | 58 | 12 | 50 | 50 | 164 | 79 | 301 | 32 | 39 | 28 | 22 |
Swell 2 Height (m) Direction Period (s) | — | WNW 9 | N 8 | — | — | — | — | — | NW 8 | NNW 8 | W 13 | W 13 | W 14 | N 15 | W 12 | NNW 13 | N 12 | NNW 10 | NW 8 |
| kJ | — | 7 | 5 | — | — | — | — | — | 2 | 11 | 4 | 3 | 4 | 168 | 3 | 58 | 26 | 19 | 14 |
Swell 3 Height (m) Direction Period (s) | W 16 | E 3 | N 8 | — | — | — | — | — | — | W 15 | — | — | — | SE 7 | ESE 4 | WNW 11 | WNW 10 | W 10 | W 9 |
| kJ | 5 | 1 | 1 | — | — | — | — | — | — | 4 | — | — | — | 2 | 2 | 24 | 11 | 8 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | NNW 5 | N 6 | NNW 7 | NNW 8 | — | — | — | — | S 3 | S 3 | SSE 2 | SE 4 | SSE 3 | SSE 3 | S 3 | SE 3 | — |
| kJ | — | — | 25 | 127 | 191 | 186 | — | — | — | — | 1 | 1 | 1 | 12 | 2 | 1 | 1 | 4 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 40 | 41 | 180 | 297 | 131 | 151 | 107 | 0 | 0 | 42 | 8 | 8 | 0 | 2 | 2 | 2 | 340 | 1035 | 340 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Castlerock Surf forecast
The above surf forecast table for Castlerock provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Castlerock can be found by selecting the local surf guide option on the grey menu. Our Castlerock surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Castlerock) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Castlerock may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Londonderry? If you are looking for accommodation near Castlerock, camping, hotels and holiday cottages in Londonderry, consider staying in Coleraine which is 8 km (5 miles) away. Other places in and around Londonderry where you can find information about places to rent, and car hire include Ballycastle which is 34 km (21 miles) away, Ballypatrick, Londonderry County Borough and Derry.
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