Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 12 am 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
15.9°C
1.6° 

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


How big are the waves at Castlerock today (03 Sep):

  • Morning surf: Morning surf (03 Sep, local time) - 1.5ft (0.5m), 7s period with NW swell.
  • Afternoon surf: Afternoon surf (03 Sep, local time) - 1.5ft (0.5m), 6s period with NW swell.
  • Evening surf: Evening surf (03 Sep, local time) - 2.5ft (0.8m), 9s period with WNW swell.

The current surf forecast for Castlerock at 4AM is: 0.4m 7s primary swell from a West-northwest direction and 0.3m 9s secondary swell from a North-northwest direction, 0.4m 3s secondary swell from a West direction (forecast issued at 12:00am September 03). The wind direction is predicted to be cross-offshore.

Time (BST) & DateWave HeightWave Period
Morning (03 Sep)1.5ft (0.5m)7s
Afternoon (03 Sep)1.5ft (0.5m)6s
Evening (03 Sep)2.5ft (0.8m)9s

Table - waves today at Castlerock. (Swell directed towards the surf break)


Short Range Forecast

Light rain (total 2mm), mostly falling on Fri morning. Very mild (max 18°C on Wed night, min 12°C on Fri night). Winds decreasing (fresh winds from the WSW on Thu night, light winds from the SSW by Sat morning).

Thursday
3
Friday
4
Saturday
5
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
2
0
0
1
0
1
1
3
2
2
2
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
NNW
8
0.4
WNW
7
0.6
WNW
7
0.5
NW
7
0.5
NW
7
0.5
NW
6
0.6
WNW
7
0.8
WNW
9
0.8
WNW
9
1
WNW
11
1.7
WNW
12
2.2
NW
13
2.1
WNW
13
2.1
WNW
12
2.2
NW
13
1.6
NW
9
2
NW
12
1.8
NW
12
1.7
NW
11
1.4
NW
10
1.3
NW
10
1.1
NW
10
1
NW
9
0.8
NW
9
Wave Graph
Metric surfscale
Energy kJ
24
20
32
23
21
20
31
94
96
242
756
1609
1452
1320
1503
449
1094
826
647
432
311
241
170
114
Wind (km/h)
25
WSW
25
WSW
15
SW
20
SW
20
SW
25
SW
25
SW
25
SW
25
SW
30
SW
40
WSW
35
WSW
35
W
35
W
35
W
30
W
25
W
20
W
15
WSW
10
SW
10
SSW
15
S
15
SSE
25
SSE
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross
cross
cross
cross-off
cross-off
off
off
cross-off
off
High Tide
10:03PM1.61m
10:22AM1.44m
10:51PM1.42m
11:21AM1.31m
00:04AM1.23m
1:05PM1.23m
Low Tide
4:16AM0.41m
4:29PM0.43m
5:07AM0.54m
5:44PM0.59m
6:33AM0.65m
8:00PM0.66m
cloud
clear
clear
cloud
cloud
cloud
cloud
part cloud
clear
part cloud
cloud
clear
rain showers
clear
clear
clear
part cloud
clear
cloud
part cloud
part cloud
cloud
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
6:37
6:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:15
8:13
8:10
 mm
1
1
1
Temp °C
16
15
13
15
17
17
15
15
14
13
14
14
15
15
14
13
13
12
12
13
16
16
14
14
Feels °C
12
11
10
12
13
12
11
11
9
7
7
7
8
8
8
7
8
8
9
11
14
13
11
9
  • 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
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

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.


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