Castlerock Surf Break

Castlerock Surf Forecast and Surf Report

Lat Long: 55.17° N 6.78° W

Issued: 12 am 27 Jun 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
14.0° C

1.3°C warmer than normal for this time of year

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


Castlerock surf forecast from 27 Jun 2026:

  • Best quality surf: Monday 29 Jun, 4PM (local time) - 4ft (1.2m), 11s period, WNW swell with glassy winds.
  • Most powerful swell: Thursday 2 Jul, 1PM (local time) - 6ft (1.8m), 10s period, NW swell with 689 kJ wave energy.
  • Next surfable swell (1★+): Monday 29 Jun, 4PM (local time) - 4ft (1.2m), 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 Monday (Jun 29) at 4PM. The primary swell is predicted to be 1.2m and 11s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Castlerock in the next 16 days are 1.8m 10s and forecast to arrive on Thursday (Jul 02) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Jun 27) at 1PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 4PM (Mon 29th Jun)4ft (1.2m) 11s
Best Surf 4PM (Mon 29th Jun)4ft (1.2m) 11s
Most Powerful 1PM (Thu 2nd Jul)6ft (1.8m) 10s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 8mm), mostly falling on Sat night. Warm (max 20°C on Fri night, min 12°C on Sat night). Winds decreasing (fresh winds from the S on Sat morning, calm by Mon afternoon).

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Wed afternoon. Very mild (max 18°C on Wed afternoon, min 12°C on Wed night). Winds increasing (calm on Tue night, fresh winds from the NW by Thu morning).

Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
1
Thursday
2
Friday
3
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
2
1
2
1
1
0
0
0
0
0
0
0
1
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
9
0.4
NW
9
0.4
NW
8
0.4
WNW
8
0.8
WNW
11
1.4
WNW
13
1.3
WNW
12
1.2
WNW
11
0.9
NW
10
0.7
NW
10
0.6
WNW
9
0.5
NW
9
0.5
NW
8
0.4
WNW
8
0.5
WNW
9
1.7
WNW
11
1.6
NW
10
1.3
NW
9
1.1
NW
8
1.1
NW
8
1.5
NW
9
Wave Graph
Metric surfscale
Energy kJ
17
21
18
22
135
630
472
323
145
96
58
39
34
27
45
657
450
262
169
181
382
Wind (km/h)
30
SSE
20
S
20
SSW
25
SW
25
WSW
25
SW
20
WSW
5
NW
10
S
5
S
10
SE
0
E
5
S
10
SE
15
SSW
40
NW
35
WNW
20
WSW
25
W
30
W
25
W
Wind State
off
off
off
cross-off
cross-off
cross-off
cross-off
glassy
off
off
cross-off
glassy
glassy
cross-off
off
cross-on
cross-on
cross-off
cross
cross
cross-off
High Tide
5:17AM1.37m
5:43PM1.48m
5:55AM1.41m
6:19PM1.56m
6:30AM1.44m
6:55PM1.63m
7:03AM1.47m
7:29PM1.68m
7:35AM1.48m
8:04PM1.71m
8:06AM1.48m
8:39PM1.72m
8:38AM1.46m
9:14PM1.71m
Low Tide
11:37AM0.42m
00:10AM0.44m
12:16PM0.36m
00:51AM0.39m
12:52PM0.31m
1:29AM0.36m
1:27PM0.26m
2:05AM0.36m
2:00PM0.22m
2:41AM0.37m
2:31PM0.20m
3:15AM0.41m
3:02PM0.21m
3:50AM0.44m
rain showers
rain showers
rain showers
part cloud
clear
part cloud
part cloud
rain showers
light rain
cloud
part cloud
part cloud
cloud
light rain
rain showers
clear
clear
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:48
4:48
4:48
4:50
4:50
4:50
4:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
10:10
10:10
10:09
10:09
10:09
10:08
10:08
 mm
1
2
3
1
1
3
5
Temp °C
19
19
16
16
17
14
16
17
16
15
14
14
16
18
14
13
14
13
16
16
13
Feels °C
15
17
13
10
11
9
14
16
14
14
13
13
16
17
12
6
8
9
11
10
8
Swell 1
Height (m)
Direction
Period (s)
0.3
WNW
9
0.4
NW
9
0.4
NW
8
0.4
WNW
8
0.8
WNW
11
1.4
WNW
13
1.3
WNW
12
1.2
WNW
11
0.9
NW
10
0.7
NW
10
0.6
WNW
9
0.5
NW
9
0.5
NW
8
0.4
WNW
8
0.5
WNW
9
1.3
NW
9
1.1
NW
8
1.1
NW
8
Energy kJ
17
21
18
22
135
630
472
323
145
96
58
39
34
27
45
262
169
181
Swell 2
Height (m)
Direction
Period (s)
0.2
NNW
5
0.3
ESE
4
0.2
WNW
11
0.4
NW
14
0.2
E
3
0.2
W
11
Energy kJ
2
3
12
49
1
10
Swell 3
Height (m)
Direction
Period (s)
0.2
WNW
10
0.1
W
13
Energy kJ
10
3
Wind waves
Height (m)
Direction
Period (s)
0.5
SE
3
0.6
SE
4
0.3
SW
2
0.5
SW
3
0.4
SW
3
0.3
WSW
3
0.3
SE
2
0.2
ESE
3
0.3
SSW
2
1.7
WNW
11
1.6
NW
10
0.6
W
4
1.5
NW
9
Energy kJ
5
14
1
4
3
1
1
1
1
657
450
9
382
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
2
1
3
2
2
1
1
1
1
1
1
3
1
1
3
1
1
3
Distance (km)
194
66
42
387
429
9
9
0
0
0
8
14
40
40
42
378
434
187
387
699
187
Best forecast wave conditions in Londonderry
Rating
(10 max)
2
1
1
Best forecast wave conditions in Ireland
Rating
(10 max)
1
1
1
2
3
2
3
3
1
1
2
2
1
3
3
2
3
Header Global
Rating
(10 max)
6
9
8
5
6
6
7
5
5
5
5
5
5
5
4
6
7
5
5
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)
Map placeholder
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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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