Surf Forecasts:
Castlerock surf forecast from 22 Oct 2026:
- Best quality surf: Sunday 25 Oct, 3AM (local time) - 20ft (6.0m), 17s period, NW swell with cross-shore winds.
- Most powerful swell: Sunday 25 Oct, 3AM (local time) - 20ft (6.0m), 17s period, NW swell with 21,331 kJ wave energy.
- Next surfable swell (1★+): Thursday 22 Oct, 4PM (local time) - 3.5ft (1.0m), 12s period with NW 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 Thursday (Oct 22) at 4PM. The primary swell is predicted to be 1.0m and 12s period with a secondary swell of 0.6m and 7s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Castlerock in the next 16 days are 6.0m 17s and forecast to arrive on Sunday (Oct 25) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Monday (Oct 26) at 3PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Thu 22nd Oct) | 3.5ft (1.0m) 12s |
| Best Surf | 3AM (Sun 25th Oct) | 20ft (6.0m) 17s |
| Most Powerful | 3AM (Sun 25th Oct) | 20ft (6.0m) 17s |
Table - best surf conditions forecast for Castlerock over the next 16 days.
Short Range ForecastHeavy rain (total 25mm), heaviest during Sat afternoon. Very mild (max 13°C on Sat afternoon, min 7°C on Thu night). Winds increasing (calm on Thu night, severe gales from the W by Sat night). | Days 4-6 Weather SummaryHeavy rain (total 20mm), heaviest during Mon afternoon. Very mild (max 16°C on Mon night, min 8°C on Sun night). Winds decreasing (near gales from the WNW on Sun morning, light winds from the SW by Sun night). | ||||||||||||||||||||
Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | Tuesday 27 | Wednesday 28 | |||||||||||||||
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) | NW 12 | NW 12 | NW 11 | NW 13 | NW 13 | NW 14 | NW 13 | NW 12 | NW 16 | NW 16 | NW 14 | NW 13 | NW 11 | NNW 11 | WNW 11 | WNW 16 | NW 16 | NW 14 | NW 13 | NW 12 | NW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 361 | 268 | 172 | 649 | 1521 | 1558 | 809 | 361 | 14022 | 13251 | 8015 | 3038 | 1027 | 286 | 386 | 5775 | 9531 | 5270 | 2536 | 1702 | 696 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | glassy | cross-on | cross-on | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | off |
High Tide | 4:37PM1.60m | 4:53AM1.40m | 5:08PM1.74m | 5:26AM1.54m | 5:40PM1.85m | 5:59AM1.67m | 6:14PM1.93m | 6:34AM1.76m | 6:50PM1.95m | 7:10AM1.82m | 7:28PM1.90m | 7:48AM1.84m | 8:08PM1.79m | ||||||||
Low Tide | 10:22AM0.42m | 11:11PM0.35m | 10:59AM0.31m | 11:41PM0.22m | 11:33AM0.21m | 00:10AM0.12m | 12:07PM0.13m | 00:40AM0.06m | 12:43PM0.07m | 1:11AM0.05m | 1:21PM0.06m | 1:44AM0.08m | 2:02PM0.09m | 2:19AM0.16m | |||||||
 |  |  |  | |  |  |  | | | | | | |  | | | | | | | |
 | 8:08 | — | — | 8:11 | — | — | 8:12 | — | — | 7:15 | — | — | 8:17 | — | — | 8:18 | — | — | 8:21 | — | — |
 | — | 6:12 | — | — | 6:09 | — | — | 6:07 | — | — | 5:05 | — | — | 6:02 | — | — | 6:00 | — | — | 5:59 | — |
mm | — | — | 3 | 5 | — | — | 7 | 6 | 4 | 1 | 1 | — | 2 | 5 | 2 | 1 | 5 | 3 | — | — | — |
Temp °C | 10 | 11 | 8 | 10 | 10 | 9 | 11 | 13 | 10 | 9 | 10 | 10 | 10 | 14 | 16 | 9 | 10 | 11 | 13 | 13 | 12 |
Feels °C | 6 | 8 | 5 | 0 | 0 | 3 | 3 | 5 | -4 | -4 | 0 | 1 | 3 | 10 | 8 | -2 | -1 | 2 | 7 | 7 | 9 |
Swell 1 Height (m) Direction Period (s) | NW 12 | NW 12 | NW 11 | — | — | NW 14 | NW 13 | NW 12 | — | — | — | NW 13 | NW 11 | NNW 11 | WNW 11 | WNW 16 | — | NW 14 | NW 13 | NW 12 | NW 11 |
| kJ | 361 | 268 | 172 | — | — | 1558 | 809 | 361 | — | — | — | 3038 | 1027 | 286 | 386 | 5775 | — | 5270 | 2536 | 1702 | 696 |
Swell 2 Height (m) Direction Period (s) | NNW 8 | NNW 7 | NNW 7 | — | — | — | — | SE 5 | — | — | — | — | — | WNW 10 | NNW 9 | — | — | — | — | — | — |
| kJ | 54 | 32 | 9 | — | — | — | — | 28 | — | — | — | — | — | 135 | 16 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 18 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | NW 13 | NW 13 | — | SE 3 | SSW 3 | NW 16 | NW 16 | NW 14 | — | S 3 | ESE 5 | S 4 | WSW 5 | NW 16 | SW 4 | — | — | — |
| kJ | — | — | — | 649 | 1521 | — | 12 | 7 | 14022 | 13251 | 8015 | — | 1 | 119 | 33 | 78 | 9531 | 11 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 377 | 443 | 9 | 283 | 1081 | 390 | 862 | 772 | 380 | 2 | 405 | 356 | 794 | 1035 | 1026 | 751 | 387 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castlerock surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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