Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 6 pm 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
15.8°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 (05 Sep):

  • Afternoon surf: Afternoon surf (05 Sep, local time) - 4.5ft (1.3m), 10s period with NW swell.
  • Evening surf: Evening surf (05 Sep, local time) - 3.5ft (1.0m), 9s period with NW swell.

The current surf forecast for Castlerock at 11PM is: 1.0m 9s primary swell from a Northwest direction (forecast issued at 06:00pm September 05). The wind direction is predicted to be cross-offshore.

Time (BST) & DateWave HeightWave Period
Morning (05 Sep)--
Afternoon (05 Sep)4.5ft (1.3m)10s
Evening (05 Sep)3.5ft (1.0m)9s

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


Short Range Forecast

Light rain (total 8mm), mostly falling on Mon afternoon. Warm (max 20°C on Sun afternoon, min 12°C on Mon night). Winds increasing (light winds from the W on Sat afternoon, strong winds from the WNW by Tue morning).

Sat
5
Sunday
6
Monday
7
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
2
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
NW
10
1.1
NW
9
1
NW
9
0.8
NW
9
0.6
NW
8
0.7
NW
8
0.6
NW
8
0.4
NW
8
0.4
NW
8
0.3
WNW
11
0.4
WNW
11
0.3
WNW
11
0.5
WNW
7
0.7
WNW
7
0.7
WNW
8
0.8
WNW
10
1
WNW
10
1.4
WNW
10
1.5
WNW
11
Wave Graph
Metric surfscale
Energy kJ
262
217
156
109
54
66
41
16
15
22
40
25
28
43
56
141
220
386
583
Wind (km/h)
5
W
10
ESE
15
SSE
25
SSE
25
SSE
20
SSE
25
S
30
S
30
S
25
SSW
25
WSW
15
SW
20
SW
20
SW
25
SSW
30
SW
30
WSW
30
SW
35
SW
Wind State
cross
cross-off
cross-off
off
off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
High Tide
1:05PM1.23m
2:14AM1.15m
3:13PM1.33m
3:55AM1.24m
4:26PM1.54m
Low Tide
8:00PM0.66m
8:41AM0.64m
10:04PM0.55m
10:11AM0.50m
part cloud
cloud
cloud
cloud
light rain
cloud
cloud
cloud
cloud
cloud
rain showers
part cloud
cloud
cloud
cloud
light rain
rain showers
cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:10
8:07
8:06
 mm
1
1
1
4
Temp °C
16
16
15
14
13
15
18
19
19
20
15
14
13
13
13
14
14
14
13
Feels °C
14
13
12
9
9
12
15
15
15
17
11
11
9
9
8
8
8
7
6
  • 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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