Kahalu'u Beach Park surfForecast / HAW – Big Island / USA

information circle48hr Weather and Surf, issued 7 pm Thursday 21 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Kahalu'u Beach Park surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kahalu'u Beach Park sea temperature is
26.5° C
(Which is 1.2°C warmer than normal for this time of year)

How big are the waves at Kahalu'u Beach Park today?

The current surf forecast for Kahalu'u Beach Park at 3AM is: 0.6m 15s primary swell from a South-southwest direction and 0.4m 12s secondary swell from a Southwest direction, 0.4m 5s secondary swell from a Northwest direction (forecast issued at 07:00pm May 21). The wind direction is predicted to be cross-offshore and the swell rating is 2.

Time (HST) & DateWave HeightWave Period
Morning (22 May)1.5ft (0.4m)18s
Afternoon (22 May)1.5ft (0.4m)18s
Evening (22 May)1.5ft (0.5m)16s

Table - waves today at Kahalu'u Beach Park. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 6mm), mostly falling on Fri night. Warm (max 26°C on Fri morning, min 23°C on Sat night). Wind will be generally light.

Thu
21
Friday
22
Saturday
23
Sun
24
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
2 AM
5 AM
8 AM
11 AM
2 PM
Rating
(10 max)
2
2
2
2
2
2
1
2
2
2
1
2
2
2
1
1
2
2
2
1
1
1
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.6
SSW
15
0.6
SSW
15
0.6
SSW
15
0.6
S
15
0.6
SSW
15
0.6
SSW
14
0.4
S
18
0.4
S
18
0.5
S
17
0.5
S
17
0.6
S
16
0.6
S
16
0.6
S
16
0.6
S
16
0.7
S
15
0.7
S
15
0.7
S
15
0.7
S
15
0.7
S
14
0.7
S
14
0.6
S
14
0.6
S
14
0.6
S
14
0.6
S
14
Wave Graph
Metric surfscale
Energy kJ
174
172
169
157
167
163
115
108
148
135
190
190
188
183
233
218
212
212
203
200
138
134
132
132
Wind (km/h)
5
WSW
0
ESE
10
SSE
10
SE
5
E
0
ENE
10
W
5
WNW
0
SE
5
ESE
5
S
5
SSE
5
E
5
SE
15
SSW
10
WSW
10
S
10
SSE
0
SSW
5
NNW
5
E
10
SSE
10
WSW
10
WNW
glassy
glassy
cross-off
cross-off
glassy
glassy
on
glassy
glassy
cross-off
cross
cross-off
glassy
cross-off
cross
cross-on
cross-off
cross-off
glassy
cross-on
glassy
cross-off
cross-on
cross-on
High Tide
8:16PM0.75m
9:37AM0.33m
9:12PM0.68m
11:07AM0.41m
10:08PM0.61m
12:10PM0.50m
Low Tide
4:01AM0.14m
1:51PM0.25m
4:46AM0.13m
3:36PM0.31m
5:24AM0.11m
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
rain showers
clear
part cloud
rain showers
rain showers
part cloud
rain showers
rain showers
rain showers
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:46
5:46
5:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:53
6:53
6:54
6:54
1
1
1
1
1
1
Temp °C
26
25
25
25
25
25
26
26
25
24
24
24
24
24
25
25
25
24
24
24
23
25
26
26
28
28
27
27
27
28
27
28
28
26
26
26
26
26
26
27
27
25
27
26
25
26
27
27
Swell 1
Height (m)
Direction
Period (s)
0.6
SSW
15
0.6
SSW
15
0.6
SSW
15
0.6
S
15
0.6
SSW
15
0.6
SSW
14
0.5
SSW
14
0.5
SSW
14
0.5
S
17
0.5
S
17
0.6
S
16
0.6
S
16
0.6
S
16
0.6
S
16
0.7
S
15
0.7
S
15
0.7
S
15
0.7
S
15
0.7
S
14
0.7
S
14
0.6
S
14
0.6
S
14
0.6
S
14
0.6
S
14
Energy kJ
174
172
169
157
167
163
115
108
148
135
190
190
188
183
233
218
212
212
203
200
138
134
132
132
Swell 2
Height (m)
Direction
Period (s)
0.3
SSW
4
0.3
SSW
12
0.4
SW
12
0.4
SW
12
0.3
S
18
0.4
S
18
0.4
S
18
0.4
S
18
0.5
S
14
0.4
SSW
14
0.5
S
13
0.5
S
13
0.4
SSW
13
0.4
SSW
13
0.2
SSE
12
0.1
SE
11
0.2
NNW
11
0.2
NNW
10
0.2
S
17
0.1
NW
15
0.2
SSW
4
0.2
S
16
0.2
S
16
0.3
S
16
Energy kJ
4
28
37
51
59
101
99
97
93
61
89
89
57
57
13
5
11
10
23
8
2
20
20
46
Swell 3
Height (m)
Direction
Period (s)
0.3
SSW
12
0.2
NNW
9
0.2
S
19
0.1
SE
12
0.1
SE
12
0.2
SSE
12
0.2
SSE
12
0.2
SSE
12
0.3
SW
11
0.2
SSW
11
0.2
NNW
10
0.2
NNW
11
0.2
NNW
11
0.2
NNW
11
0.1
NW
11
0.2
S
18
0.2
S
18
0.2
NNW
10
0.1
S
11
0.2
NNW
10
0.1
NW
10
0.1
NW
13
0.1
NW
13
Energy kJ
28
8
30
6
6
14
14
14
19
12
10
11
11
12
5
25
25
10
2
10
4
7
7
Wind waves
Height (m)
Direction
Period (s)
0.3
NNW
5
0.4
NW
5
0.4
NW
5
0.3
SW
11
0.3
WSW
11
0.4
NW
5
0.4
NW
5
0.4
SE
5
0.3
NW
11
0.2
SSE
5
0.3
NW
10
0.3
NNW
5
0.4
NW
10
Energy kJ
5
6
6
19
23
6
6
6
18
2
16
5
24
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
2
2
2
1
2
2
2
2
2
2
2
1
1
2
2
2
1
1
1
1
1
Distance (km)
0
0
0
0
0
0
138
0
0
0
1
0
0
0
25
14
0
0
0
5
0
0
25
128
Best forecast wave conditions in Big Island
Rating
(10 max)
2
2
2
2
2
2
2
2
2
2
3
2
2
1
1
2
2
2
2
1
2
1
Best forecast wave conditions in United States
Rating
(10 max)
2
3
3
3
3
2
3
2
2
2
4
3
2
2
3
3
2
3
2
3
3
3
1
2
Header Global
Rating
(10 max)
5
7
7
7
6
7
6
5
5
6
7
8
7
6
5
5
5
5
5
5
5
5
5
5
  • 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

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