Surf Forecasts:
Castlerock surf forecast from 15 Nov 2026:
- Best quality surf: Sunday 22 Nov, 6PM (local time) - 5.5ft (1.7m), 12s period, WNW swell with offshore winds.
- Most powerful swell: Saturday 28 Nov, 6AM (local time) - 4.5ft (1.4m), 18s period, WNW swell with 1,199 kJ wave energy.
- Next surfable swell (1★+): Monday 16 Nov, 9AM (local time) - 4ft (1.2m), 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 Monday (Nov 16) at 9AM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.3m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Castlerock in the next 16 days are 1.4m 18s and forecast to arrive on Saturday (Nov 28) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 7s period and expected on Tuesday (Nov 17) at 3AM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Mon 16th Nov) | 4ft (1.2m) 8s |
| Best Surf | 6PM (Sun 22nd Nov) | 5.5ft (1.7m) 12s |
| Most Powerful | 6AM (Sat 28th Nov) | 4.5ft (1.4m) 18s |
Table - best surf conditions forecast for Castlerock over the next 16 days.
Short Range ForecastHeavy rain (total 20mm), heaviest during Mon night. Very mild (max 10°C on Tue morning, min 4°C on Mon night). Winds increasing (calm on Mon morning, near gales from the ESE by Mon night). | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Wed morning. Mild temperatures (max 8°C on Thu afternoon, min 3°C on Fri night). Winds decreasing (strong winds from the E on Wed afternoon, calm by Fri night). | ||||||||||||||||||||
Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | |||||||||||||||
AM | PM | 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) | NNW 10 | NNW 8 | NNW 9 | NNW 8 | NNW 8 | N 12 | W 13 | W 12 | WNW 14 | WNW 16 | WNW 16 | WNW 16 | WNW 15 | WNW 14 | WNW 13 | N 5 | WNW 12 | WNW 11 | NNW 10 | N 9 | W 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 332 | 789 | 757 | 190 | 73 | 12 | 3 | 12 | 80 | 382 | 659 | 387 | 191 | 118 | 34 | 17 | 14 | 12 | 9 | 6 | 2 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | on | on | off | cross-off | cross-off | cross-off |
High Tide | 9:05AM1.42m | 9:02PM1.17m | 10:02AM1.33m | 9:56PM1.08m | 11:19AM1.29m | 11:26PM1.02m | 12:47PM1.32m | 1:15AM1.07m | 1:53PM1.41m | 2:24AM1.19m | 2:41PM1.53m | 3:12AM1.33m | 3:25PM1.65m | ||||||||
Low Tide | 3:57PM0.68m | 3:34AM0.54m | 5:11PM0.74m | 4:44AM0.60m | 6:34PM0.73m | 6:06AM0.61m | 7:45PM0.65m | 7:19AM0.59m | 8:38PM0.53m | 8:19AM0.52m | 9:21PM0.39m | 9:11AM0.43m | 9:59PM0.27m | ||||||||
 |  |  |  | |  | | |  | |  | |  | |  | | | | |  | | |
 | 7:58 | — | — | 8:00 | — | — | 8:02 | — | — | 8:03 | — | — | 8:06 | — | — | 8:07 | — | — | 8:10 | — | — |
 | — | 4:22 | — | — | 4:22 | — | — | 4:20 | — | — | 4:19 | — | — | 4:16 | — | — | 4:15 | — | — | 4:14 | — |
mm | 2 | — | — | — | — | 12 | 5 | — | 1 | 5 | 6 | 2 | — | — | — | — | — | — | — | 12 | — |
Temp °C | 9 | 7 | 6 | 5 | 6 | 7 | 10 | 10 | 8 | 7 | 6 | 7 | 7 | 8 | 7 | 8 | 8 | 6 | 8 | 8 | 7 |
Feels °C | 2 | -3 | -4 | 2 | -1 | -4 | 5 | 5 | 4 | -1 | -3 | -1 | 0 | 2 | 2 | 3 | 3 | 4 | 0 | 0 | 2 |
Swell 1 Height (m) Direction Period (s) | N 16 | NNW 15 | W 11 | NNW 8 | NNW 8 | NNW 8 | E 6 | ENE 5 | WNW 14 | WNW 16 | WNW 16 | WNW 16 | WNW 15 | WNW 14 | N 5 | N 5 | NNW 5 | NNW 4 | NNW 10 | N 9 | E 4 |
| kJ | 174 | 42 | 9 | 190 | 73 | 12 | 181 | 19 | 80 | 382 | 659 | 387 | 191 | 118 | 16 | 17 | 7 | 3 | 9 | 6 | 6 |
Swell 2 Height (m) Direction Period (s) | W 12 | — | — | N 13 | NNW 13 | N 12 | N 11 | W 12 | WNW 6 | N 10 | — | N 10 | N 6 | — | WNW 13 | WNW 12 | WNW 12 | WNW 11 | W 10 | W 10 | N 9 |
| kJ | 3 | — | — | 30 | 32 | 11 | 2 | 12 | 6 | 2 | — | 2 | 5 | — | 34 | 15 | 14 | 12 | 8 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 11 | W 10 | W 10 | W 13 | N 10 | — | — | — | — | N 9 | — | N 10 | N 10 | N 11 | N 10 | N 10 | — | W 11 |
| kJ | — | — | — | 9 | 8 | 2 | 3 | 2 | — | — | — | — | 2 | — | 2 | 2 | 2 | 2 | 2 | — | 2 |
Wind waves Height (m) Direction Period (s) | NNW 10 | NNW 8 | NNW 9 | — | E 2 | ESE 6 | — | W 2 | SSW 2 | ENE 4 | E 5 | E 6 | ENE 5 | NE 4 | — | — | — | — | SE 3 | ESE 5 | S 2 |
| kJ | 332 | 789 | 757 | — | 1 | 384 | — | 1 | 1 | 18 | 61 | 149 | 46 | 29 | — | — | — | — | 2 | 56 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 192 | 262 | 251 | 0 | 2 | 791 | 16 | 71 | 0 | 101 | 107 | 236 | 236 | 131 | 66 | 97 | 79 | 40 | 270 | 56 | 42 |
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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