Castles Beach Surf Break

Lat Long: 21.42° N 157.74° W

Castles Beach 48 hour detailed Surf Forecast

Issued: 1 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castles Beach sea temperature is
26.9° C
0.2° 

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


How big are the waves at Castles Beach today (18 Aug):

  • Morning surf: Morning surf (18 Aug, local time) - 4.5ft (1.4m), 7s period with ENE swell.
  • Afternoon surf: Afternoon surf (18 Aug, local time) - 4ft (1.2m), 7s period with ENE swell.
  • Evening surf: Evening surf (18 Aug, local time) - 3.5ft (1.1m), 8s period with ENE swell.

The current surf forecast for Castles Beach at 5AM is: 1.4m 7s primary swell from a East-northeast direction and 0.4m 13s secondary swell from a South direction, 0.3m 9s secondary swell from a East direction (forecast issued at 01:00am August 18). The wind direction is predicted to be onshore.

Time (HST) & DateWave HeightWave Period
Morning (18 Aug)4.5ft (1.4m)7s
Afternoon (18 Aug)4ft (1.2m)7s
Evening (18 Aug)3.5ft (1.1m)8s

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


Short Range Forecast

Mostly dry. Warm (max 26°C on Wed afternoon, min 24°C on Tue night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
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
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
ENE
7
1.4
ENE
7
1.4
ENE
7
1.3
ENE
7
1.2
ENE
7
1.1
ENE
7
1.1
ENE
7
1.1
ENE
8
1.1
ENE
8
1.1
ENE
8
1.2
ENE
7
0.8
E
8
0.8
E
8
0.8
E
8
1
ENE
8
0.8
E
8
0.8
E
8
0.8
E
8
0.8
E
8
0.7
E
8
0.7
E
8
0.7
E
8
1
NE
7
1.1
NE
7
Wave Graph
Metric surfscale
Energy kJ
188
168
168
149
156
136
140
143
143
151
128
89
86
84
140
82
84
80
78
58
55
55
94
119
Wind (km/h)
25
ENE
25
E
25
ENE
20
E
20
ENE
20
ENE
20
ENE
20
ENE
20
ENE
20
ENE
15
ENE
15
ENE
15
NE
15
NE
15
ENE
20
ENE
15
ENE
10
ENE
10
NE
10
NE
10
NE
15
NE
10
NE
5
NE
Wind State
on
on
on
on
on
cross-on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
glassy
High Tide
7:01AM0.60m
4:19PM0.57m
8:55AM0.61m
11:13AM0.64m
Low Tide
11:37PM0.19m
11:57AM0.50m
00:07AM0.20m
00:51AM0.22m
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:59
6:58
6:57
 mm
Temp °C
25
25
25
25
25
25
25
25
24
24
24
25
25
26
25
25
24
24
24
25
25
26
26
25
Feels °C
24
24
24
25
24
25
25
25
24
24
25
26
26
27
26
26
25
26
26
28
28
28
30
29
  • 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 Castles Beach 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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