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Surf Forecasts:

Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle12 Day Weather and Surf, issued 5 am Tuesday 25 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
11.9° 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 Tuesday (Nov 25) at 3PM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.6m and 6s. 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 3.0m 16s and forecast to arrive on Friday (Nov 28) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Nov 30) at 9PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Tue 25th Nov)1.5ft (0.5m) 9s
Best Surf 3AM (Sat 29th Nov)6ft (1.8m) 12s
Most Powerful12AM (Fri 28th Nov)10ft (3.0m) 16s

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 3mm), mostly falling on Thu morning. Very mild (max 14°C on Thu morning, min 5°C on Tue night). Winds increasing (light winds from the NW on Tue morning, strong winds from the SW by Thu night).

Days 3-6 Weather Summary Moderate rain (total 18mm), heaviest on Sun night. Mild temperatures (max 8°C on Fri morning, min 3°C on Sun afternoon). Winds increasing (calm on Sat night, fresh winds from the S by Sun night).

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
01
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
1
0
0
1
0
0
0
2
2
2
2
2
0
0
0
0
1
1
1
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1
NNW
0.5
WNW
0.4
WNW
0.4
WNW
0.3
NW
0.6
WNW
0.7
WNW
1
WNW
3
NW
2.5
NW
2.2
NW
1.8
NW
2.4
NW
1.7
NW
1.4
NW
0.9
NW
0.6
NW
0.5
WNW
0.3
NNW
0.6
WNW
1.6
WNW
Period(s) (?)699814121111161513121212109910171113
Wave
Graph
(?)Metric surfscale
Energy kJ (?)7745312842981032264356257916939601693768441123646359100875
Wind
(km/h)
15
N
10
WSW
20
S
25
S
20
S
25
S
30
SSW
30
SW
40
SW
30
SW
30
WSW
20
SW
20
WNW
30
N
15
N
15
SSE
30
SSE
25
S
20
SSE
15
SSW
35
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
off		offoffoffoffoffcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crossononcross-
off		offoffoffoffcross
High Tide
/ height (m)
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
2:52PM
1.67
Low Tide
/ height (m)
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
8:26AM
0.44
9:30PM
0.27
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
01
Sunrise8:17--8:18--8:21--8:22--8:23--8:26--8:27--
Sunset-4:08--4:07--4:07--4:06--4:05--4:04--4:02-
clear
part cloud
cloud
rain showers
cloud
cloud
light rain
clear
part cloud
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
cloud
light rain
mod rain
heavy rain
mod rain
rain showers
Rain (mm)
---1--2--11121--2101262
Temp. °C88678131411988788745812129
Feels °C (?)451248841101300-1-3579-2
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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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