Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 6 am 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
15.7°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 (08 Sep):

  • Morning surf: Morning surf (08 Sep, local time) - 7ft (2.2m), 11s period with NW swell.
  • Afternoon surf: Afternoon surf (08 Sep, local time) - 8ft (2.5m), 10s period with NW swell.
  • Evening surf: Evening surf (08 Sep, local time) - 8ft (2.5m), 10s period with NNW swell.

The current surf forecast for Castlerock at 10AM is: 2.3m 10s primary swell from a Northwest direction (forecast issued at 06:00am September 08). The wind direction is predicted to be cross-shore.

Time (BST) & DateWave HeightWave Period
Morning (08 Sep)7ft (2.2m)11s
Afternoon (08 Sep)8ft (2.5m)10s
Evening (08 Sep)8ft (2.5m)10s

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


Short Range Forecast

Light rain (total 3mm), mostly falling on Thu morning. Very mild (max 16°C on Thu afternoon, min 12°C on Tue night). Winds decreasing (strong winds from the NW on Tue afternoon, calm by Wed afternoon).

Tuesday
8
Wednesday
9
Thursday
10
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)
1
0
0
0
0
0
0
0
0
1
0
1
0
1
1
0
0
0
0
0
0
0
0
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)
1.6
NW
11
2.2
NW
11
2.3
NW
10
2.5
NW
10
2.5
NW
10
3
NW
11
2.5
NNW
10
2.4
NNW
10
2.1
NNW
10
1.7
NNW
9
1.4
NNW
9
1.2
NNW
9
0.9
NNW
8
0.7
NNW
8
0.6
NNW
8
0.5
NW
8
0.5
NW
7
0.5
NW
7
0.4
WNW
7
0.4
WNW
9
0.4
WNW
11
0.4
WNW
11
0.3
WNW
12
Wave Graph
Metric surfscale
Energy kJ
561
1070
1111
1178
1519
1729
1567
1147
798
501
307
202
96
56
41
28
27
26
21
30
47
48
27
Wind (km/h)
35
WSW
35
W
35
WNW
40
WNW
40
WNW
40
NW
35
NW
30
NW
25
NW
15
NW
15
W
10
W
10
W
0
S
15
SSE
15
S
20
SSE
20
SSE
25
S
25
S
15
SSW
20
WSW
25
W
Wind State
cross-off
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
glassy
cross-off
off
off
off
off
off
cross-off
cross-off
cross
High Tide
4:53AM1.37m
5:16PM1.76m
5:36AM1.49m
5:58PM1.94m
6:13AM1.60m
6:36PM2.05m
Low Tide
11:05AM0.32m
11:58PM0.22m
11:48AM0.16m
00:37AM0.11m
12:25PM0.03m
clear
cloud
rain showers
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
cloud
part cloud
cloud
cloud
cloud
cloud
cloud
light rain
cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:45
6:46
6:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:02
8:00
7:58
 mm
1
2
Temp °C
13
13
13
14
14
13
13
13
12
12
13
14
15
15
14
12
12
12
13
14
15
16
14
Feels °C
6
6
6
6
6
4
5
7
6
9
10
11
13
14
11
8
8
8
8
10
13
13
10
  • 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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