Castlerock Surf Break
Lat Long: 55.17° N 6.78° W

Castlerock Surf Forecast and Surf Report

Weather Forecast for Castlerock

Issued: 12 am 08 Jun 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
12.5° C

Slightly warmer than usual

Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Castlerock surf forecast from 8 Jun 2026:

  • Best quality surf: Thursday 11 Jun, 1AM (local time) - 3.5ft (1.1m), 9s period, NW swell with offshore winds.
  • Most powerful swell: Tuesday 9 Jun, 1PM (local time) - 4ft (1.2m), 11s period, WNW swell with 353 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 9 Jun, 4AM (local time) - 2.5ft (0.8m), 11s period with WNW 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 Tuesday (Jun 09) at 4AM. The primary swell is predicted to be 0.8m and 11s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Castlerock in the next 16 days are 1.2m 11s and forecast to arrive on Tuesday (Jun 09) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 2s period and expected on Monday (Jun 08) at 10AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Tue 9th Jun)2.5ft (0.8m) 11s
Best Surf 1AM (Thu 11th Jun)3.5ft (1.1m) 9s
Most Powerful 1PM (Tue 9th Jun)4ft (1.2m) 11s

Table - best surf conditions forecast for Castlerock over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 14mm), heaviest on Sun night. Very mild (max 13°C on Mon morning, min 7°C on Mon night). Winds increasing (calm on Sun night, fresh winds from the WNW by Tue morning).

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Thu morning. Very mild (max 17°C on Sat morning, min 9°C on Wed night). Mainly fresh winds.

Monday
8
Tuesday
9
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
1
0
0
2
1
0
0
0
0
1
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
WNW
12
0.8
WNW
11
0.9
WNW
10
0.8
WNW
11
0.8
WNW
11
0.9
WNW
10
0.8
WNW
10
0.6
WNW
9
1.1
NW
9
1
NW
9
0.8
NW
9
1.3
WNW
8
1.4
NW
9
1.1
NW
9
0.9
NW
8
0.9
WNW
11
0.8
WNW
11
0.6
WNW
10
0.3
WNW
10
0.3
WNW
10
0.2
WNW
10
Wave Graph
Metric surfscale
Energy kJ
28
135
170
135
138
163
117
56
211
162
95
230
268
197
84
193
151
73
20
19
9
Wind (km/h)
25
SW
25
SW
20
SW
30
W
25
WNW
15
SSW
25
W
25
WNW
15
S
20
SSE
30
W
25
W
20
W
25
WNW
15
SW
20
W
25
WNW
10
NW
5
N
10
NNE
5
SSE
Wind State
cross-off
cross-off
cross-off
cross
cross-on
cross-off
cross
cross
off
off
cross
cross
cross
cross
cross-off
cross
cross-on
cross-on
glassy
on
off
High Tide
12:07PM1.15m
00:59AM1.45m
1:30PM1.15m
2:07AM1.49m
2:48PM1.22m
3:11AM1.56m
3:51PM1.35m
4:10AM1.64m
4:44PM1.49m
5:04AM1.70m
5:33PM1.64m
5:55AM1.74m
6:21PM1.77m
Low Tide
6:49AM0.61m
6:23PM0.52m
7:52AM0.56m
7:29PM0.53m
8:53AM0.47m
8:38PM0.50m
9:49AM0.38m
9:46PM0.43m
10:42AM0.30m
10:50PM0.33m
11:31AM0.22m
11:49PM0.23m
12:18PM0.17m
00:46AM0.15m
part cloud
light rain
rain showers
thunderstorm
rain showers
cloud
rain showers
rain showers
rain showers
light rain
cloud
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:48
4:48
4:48
4:47
4:47
4:47
4:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
10:02
10:04
10:05
10:05
10:06
10:07
10:07
 mm
2
1
3
1
2
2
3
5
1
Temp °C
13
13
10
11
13
9
12
13
11
12
14
13
14
15
15
17
17
12
14
16
16
Feels °C
8
8
5
5
7
3
7
8
8
9
9
10
9
11
14
13
13
10
13
15
15
Swell 1
Height (m)
Direction
Period (s)
0.4
WNW
7
0.8
WNW
11
0.9
WNW
10
0.8
WNW
11
0.8
WNW
11
0.9
WNW
10
0.6
WNW
9
1.1
NW
9
1
NW
9
0.8
NW
9
1.4
NW
9
1.1
NW
9
0.9
NW
8
0.9
WNW
11
0.8
WNW
11
0.6
WNW
10
0.3
WNW
10
0.3
WNW
10
0.2
E
4
Energy kJ
19
135
170
135
138
163
56
211
162
95
268
197
84
193
151
73
20
19
1
Swell 2
Height (m)
Direction
Period (s)
0.3
WNW
10
0.2
S
3
0.4
WNW
12
0.1
N
8
0.1
N
8
0.1
N
7
0.3
NW
6
0.1
N
7
0.2
WNW
10
Energy kJ
19
1
53
1
1
1
5
1
9
Swell 3
Height (m)
Direction
Period (s)
0.3
WNW
12
0.1
N
7
0.1
NW
5
Energy kJ
28
1
1
Wind waves
Height (m)
Direction
Period (s)
0.4
SW
2
0.3
SW
2
0.5
W
3
0.9
WNW
6
0.8
WNW
10
0.7
NW
5
0.3
WSW
2
1.3
WNW
8
0.2
ESE
4
0.2
ESE
3
0.4
SE
3
Energy kJ
1
1
4
63
117
30
1
230
1
1
3
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
2
1
1
2
2
2
1
2
1
1
1
1
1
1
2
2
2
1
Distance (km)
9
9
9
84
442
0
157
429
0
0
336
380
380
387
0
71
251
40
40
40
40
Best forecast wave conditions in Londonderry
Rating
(10 max)
1
2
1
1
Best forecast wave conditions in Ireland
Rating
(10 max)
1
1
1
1
3
2
1
1
3
3
3
4
3
2
2
2
1
Header Global
Rating
(10 max)
6
5
6
9
9
7
5
9
9
7
6
7
7
7
4
5
6
5
4
7
5
  • 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 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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