Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle12 Day Weather and Surf, issued 6 am Sunday 13 Jul 2025 BST
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
15.3° C
(Which is 1.6°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Castlerock this week:

The most powerful waves expected at Castlerock in the next 12 days are 0.8m 5s and forecast to arrive on Monday (Jul 14) at 10AM. Winds are predicted to be 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 Monday (Jul 14) at 7AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful10AM (Mon 14th Jul)2.5ft (0.8m) 5s

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

Updates in  hr  min  s Forecast update imminent
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.2
WNW
0.2
WNW
0.2
WNW
0.8
E
0.2
WNW
0.2
WNW
0.2
WNW
0.5
NNE
0.4
N
0.1
W
0.1
W
0.1
W
0.1
W
0.1
W
0.1
NW
0.1
W
0.1
W
0.1
W
0.1
W
0.1
W
0.1
NW
0.1
W
0.2
WNW
0.2
W
0.5
W
0.4
NW
0.6
WNW
0.6
WNW
0.4
WNW
0.4
NW
0.5
WNW
0.5
WNW
0.8
WNW
0.7
NW
0.6
NW
0.5
NW
Period(s) (?)9910598844987776106661098495109998888776
Wave
Graph
(?)Metric surfscale
Energy (?)8717437791812411112521134246285055523017343574716836
Wind
(km/h)
15
SE
25
ESE
20
ESE
20
SSE
25
SSW
15
S
5
NNW
20
NW
10
W
5
S
10
NE
10
SSE
10
ENE
10
NNW
5
NW
5
NNE
10
NNE
5
ESE
5
ESE
10
NNE
5
NNW
10
N
15
NNW
15
NW
15
NW
20
NW
5
SE
15
SSE
25
W
20
WSW
20
W
15
SW
15
WSW
20
W
10
NNW
15
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
offcross-
off
offglasscross-
on
crossglasscross-
on
cross-
off
crossoncross-
on
glasscross-
on
glassglasscross-
on
onononcross-
on
cross-
on
cross-
on
cross-
off
offcrosscross-
off
crosscross-
off
cross-
off
crossonoff
High Tide
/ height (m)
8:51PM
1.84
8:55AM
1.52
9:29PM
1.84
9:35AM
1.47
10:10PM
1.81
10:19AM
1.40
10:54PM
1.73
11:09AM
1.32
11:47PM
1.62
12:12PM
1.25
12:54AM
1.50
1:35PM
1.23
2:18AM
1.41
3:05PM
1.29
3:41AM
1.40
4:20PM
1.43
4:49AM
1.44
5:19PM
1.59
5:44AM
1.50
6:09PM
1.74
6:29AM
1.54
6:54PM
1.86
Low Tide
/ height (m)
2:38PM
0.13
3:26AM
0.31
3:10PM
0.14
4:05AM
0.33
3:46PM
0.18
4:47AM
0.37
4:26PM
0.25
5:34AM
0.41
5:15PM
0.35
6:29AM
0.47
6:17PM
0.45
7:34AM
0.51
7:40PM
0.52
8:52AM
0.52
9:19PM
0.52
10:10AM
0.48
10:50PM
0.44
11:14AM
0.39
11:57PM
0.32
12:05PM
0.28
12:49AM
0.23
12:48PM
0.18
1:34AM
0.18
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Sunrise5:03--5:05--5:05--5:07--5:09--5:09--5:11--5:13--5:15--5:16--5:18--5:20--
Sunset-10:00--9:59--9:58--9:57--9:55--9:53--9:52--9:52--9:50--9:49--9:46--9:45-
clearclearlight rainrain showersthunderstorm part cloudlight rainclearclearclearpart cloudlight rainlight raincloudcloudclearpart cloudclearcloudpart cloudpart cloudpart cloudpart cloudpart cloudpart cloudclearpart cloudlight rainrain showerspart cloudpart cloudlight rainrain showerspart cloudpart cloudpart cloud
Rain (mm)
--321-3----14--------------21--23---
Temp. °C222320171714131514161917131414161615171715151514151513151614161514161616
Feels °C (?)181919151212121212151715111313151514161514141312121212131211131312131514

Short Range Forecast: Light rain (total 9mm), mostly falling on Tue morning. Warm (max 23°C on Sun afternoon, min 10°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Thu morning. Very mild (max 19°C on Wed afternoon, min 12°C on Thu morning). Wind will be generally light.

Days 6-9 Weather Summary Mostly dry. Very mild (max 17°C on Sat morning, min 12°C on Mon night). Wind will be generally light.

Long Range Forecast: Light rain (total 8mm), mostly falling on Tue morning. Very mild (max 16°C on Tue afternoon, min 13°C on Tue afternoon). Winds decreasing (fresh winds from the W on Tue night, light winds from the NNW by Thu afternoon).

  • 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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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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