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Surf Forecasts:

Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle12 Day Weather and Surf, issued 5 am Wednesday 26 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
11.8° C
 (Which is 1.0°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 0.5m and 10s period. The wind is predicted to be 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 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Friday (Nov 28) at 12PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Wed 26th Nov)1.5ft (0.5m) 10s
Best Surf 6PM (Tue 2nd Dec)3ft (0.9m) 17s
Most Powerful 3AM (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 Heavy rain (total 24mm), heaviest during Fri night. Very mild (max 14°C on Wed night, min 5°C on Fri night). Winds decreasing (near gales from the SW on Thu night, light winds from the N by Fri night).

Days 3-6 Weather Summary Heavy rain (total 42mm), heaviest during Mon night. Mild temperatures (max 9°C on Mon morning, min 4°C on Sun morning). Winds increasing (calm on Sat night, strong winds from the NNW by Mon night).

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
01
Tuesday
02
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
1
0
0
0
0
0
2
3
1
1
0
1
1
0
1
0
1
1
1
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.4
WNW
0.5
WNW
0.6
WNW
0.7
WNW
1
WNW
3
NW
3
NW
3
NW
2.3
NW
1.4
NNW
1
NNW
0.8
NNW
0.9
NNW
0.8
NW
0.3
WNW
0.5
WNW
0.4
WNW
0.9
WNW
0.9
NW
0.8
WNW
1.4
NW
Period(s) (?)8109111117161513111110999111212131216
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2859651012145876470437621756452240125148971673532472411901018
Wind
(km/h)
25
S
20
SSW
20
SSW
30
SSW
45
SW
50
SW
50
SW
45
WSW
10
N
15
WNW
15
NNW
20
NNW
15
S
20
SSE
40
S
10
SSW
5
SSW
20
SSW
20
WSW
10
SSW
20
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffcross-
off		offcross-
off		cross-
off		cross-
off		cross-
off		oncrosscross-
on		onoffoffoffoffoffcross-
off		cross-
off		offcross-
on
High Tide
/ height (m)
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
2:52PM
1.67
3:27AM
1.45
3:43PM
1.77
Low Tide
/ height (m)
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
8:26AM
0.44
9:30PM
0.27
9:26AM
0.33
10:15PM
0.18
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
01
Tuesday
02
Sunrise8:18--8:21--8:22--8:23--8:26--8:27--8:29--
Sunset-4:07--4:07--4:06--4:05--4:04--4:02--4:01-
light rain
light rain
light rain
cloud
rain showers
part cloud
light rain
rain showers
heavy rain
light rain
rain showers
clear
part cloud
cloud
mod rain
mod rain
part cloud
heavy rain
light rain
cloud
rain showers
Rain (mm)
211-1-111723---88-211-2
Temp. °C7111414119897887548999888
Feels °C (?)271192-3-3-123410-22573355
  • 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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Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.

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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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