Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 12 pm 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
15.7°C
1.5° 

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 (04 Sep):

  • Morning surf: Morning surf (04 Sep, local time) - 8ft (2.4m), 12s period with WNW swell.
  • Afternoon surf: Afternoon surf (04 Sep, local time) - 7.5ft (2.3m), 12s period with WNW swell.
  • Evening surf: Evening surf (04 Sep, local time) - 7ft (2.1m), 12s period with NW swell.

The current surf forecast for Castlerock at 8PM is: 2.4m 12s primary swell from a West-northwest direction and 2.1m 12s secondary swell from a West-northwest direction (forecast issued at 12:00pm September 04). The wind direction is predicted to be cross-shore.

Time (BST) & DateWave HeightWave Period
Morning (04 Sep)8ft (2.4m)12s
Afternoon (04 Sep)7.5ft (2.3m)12s
Evening (04 Sep)7ft (2.1m)12s

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


Short Range Forecast

Some drizzle, heaviest during Sun afternoon. Very mild (max 19°C on Sun afternoon, min 12°C on Fri night). Winds decreasing (strong winds from the W on Fri morning, calm by Sat afternoon).

Fri
4
Saturday
5
Sunday
6
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
1
1
0
2
2
2
2
1
0
0
1
1
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
WNW
12
2.3
WNW
12
2.2
WNW
12
2.4
WNW
12
2.1
NW
12
1.9
NW
12
1.8
NW
12
1.7
NW
11
1.6
NW
10
1.3
NW
10
1.2
NW
10
1.1
NW
9
1
NW
9
0.8
NW
9
0.6
NNW
8
0.7
NW
8
0.5
NW
8
0.4
NW
8
0.3
WNW
9
0.4
WNW
11
0.4
WNW
12
Wave Graph
Metric surfscale
Energy kJ
1707
1640
1361
1707
1327
1059
913
635
523
327
257
217
156
109
45
66
31
16
15
41
46
Wind (km/h)
40
W
40
W
40
W
35
W
30
W
30
W
25
W
20
WSW
20
WSW
15
W
5
SSW
10
ENE
20
SSE
25
S
25
SSE
20
S
25
S
25
S
30
S
30
SSW
25
WSW
Wind State
cross
cross
cross
cross
cross
cross
cross
cross-off
cross-off
cross-off
glassy
cross
cross-off
off
off
off
off
off
off
cross-off
cross-off
High Tide
11:21AM1.31m
00:04AM1.23m
1:05PM1.23m
2:14AM1.15m
3:13PM1.33m
Low Tide
5:44PM0.59m
6:33AM0.65m
8:00PM0.66m
8:41AM0.64m
clear
clear
clear
cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
part cloud
cloud
cloud
cloud
light rain
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:37
6:39
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:13
8:10
8:07
 mm
1
Temp °C
15
15
15
14
13
13
13
12
13
16
17
16
15
14
14
16
17
17
19
19
15
Feels °C
7
7
8
7
7
7
8
8
9
13
16
14
11
9
10
14
14
13
16
15
11
  • 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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