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Surf Forecasts:

Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle12 Day Weather and Surf, issued 11 am Monday 24 Nov 2025 GMT
Forecast 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
12.0° C
 (Which is 1.1°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Castlerock this week:

The surf forecast for Castlerock over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Nov 26) at 3PM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.3m and 14s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Castlerock in the next 12 days are 3.5m 18s and forecast to arrive on Friday (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 1.1m 4s period and expected on Monday (Dec 01) at 6PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Wed 26th Nov)1.5ft (0.4m) 11s
Best Surf12PM (Sun 30th Nov)3ft (0.9m) 11s
Most Powerful 6AM (Fri 28th Nov)11ft (3.5m) 18s

Table - best surf conditions forecast for Castlerock over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 9mm), mostly falling on Wed morning. Very mild (max 13°C on Wed night, min 5°C on Tue night). Winds decreasing (strong winds from the N on Mon afternoon, light winds from the NW by Tue morning).

Days 3-6 Weather Summary Moderate rain (total 12mm), heaviest on Thu afternoon. Very mild (max 14°C on Thu morning, min 7°C on Fri morning). Winds decreasing (strong winds from the SW on Thu night, moderate winds from the NNW by Sat night).

Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
1
1
0
0
2
6
2
2
2
0
0
1
2
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.8
WNW
2
N
1.6
N
1
NNW
0.5
WNW
0.4
WNW
0.4
NW
0.4
WNW
0.6
WNW
0.4
WNW
0.8
WNW
3
NW
3.5
NW
3
NW
2.5
NW
2.1
NW
1.8
NW
1.9
NW
1.5
NNW
1.1
NW
0.7
NW
Period(s) (?)11776998111211101618161413121211109
Wave
Graph
(?)Metric surfscale
Energy kJ (?)148382240724531184498471213985693045232985156892997853322983
Wind
(km/h)
30
N
40
N
30
NNW
15
NNW
10
WNW
20
S
25
S
15
SSW
25
SSE
30
SSW
35
WSW
40
SW
30
SSW
35
SW
35
SW
30
WSW
25
WNW
30
NNW
15
NNW
15
S
35
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
ononononcrossoffoffcross-
off		offoffcross-
off		cross-
off		offcross-
off		cross-
off		cross-
off		cross-
on		oncross-
on		offoff
High Tide
/ height (m)
7:56PM
1.37
8:33AM
1.52
8:34PM
1.29
9:21AM
1.45
9:21PM
1.21
10:19AM
1.41
10:26PM
1.13
11:31AM
1.41
11:56PM
1.10
12:48PM
1.46
1:27AM
1.16
1:55PM
1.56
2:34AM
1.29
Low Tide
/ height (m)
2:22PM
0.51
2:11AM
0.38
3:06PM
0.60
2:51AM
0.43
4:04PM
0.66
3:42AM
0.49
5:18PM
0.68
4:50AM
0.54
6:35PM
0.62
6:06AM
0.55
7:44PM
0.52
7:20AM
0.52
8:41PM
0.39
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Sunrise8:15--8:17--8:18--8:21--8:22--8:23--8:26--
Sunset-4:09--4:08--4:07--4:07--4:06--4:05--4:04-
clear
clear
rain showers
rain showers
part cloud
part cloud
light rain
part cloud
light rain
part cloud
rain showers
clear
part cloud
light rain
rain showers
light rain
rain showers
rain showers
part cloud
part cloud
mod rain
Rain (mm)
--11--5-2-3--11322--8
Temp. °C1098996791314118988999768
Feels °C (?)3-1-165226994-2002231213
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Latest Updates

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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.

View detailed surf forecast for Castlerock at:
surf-forecast.com

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 12 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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