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

information circle48hr Weather and Surf, issued 7 pm Sunday 17 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
26.4° 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 11PM is: 0.7m 15s primary swell from a South-southwest direction and 0.4m 10s secondary swell from a South direction (forecast issued at 07:00pm May 17). The wind direction is predicted to be glassy and the swell rating is 2.

Time (HST) & DateWave HeightWave Period
Morning (17 May)--
Afternoon (17 May)2ft (0.6m)15s
Evening (17 May)2.5ft (0.7m)15s

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

Heavy rain (total 21mm), heaviest during Mon afternoon. Warm (max 27°C on Mon morning, min 24°C on Tue night). Wind will be generally light.

Sun
17
Monday
18
Tuesday
19
Wed
20
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)
0
0
2
2
2
1
0
1
1
1
0
0
2
1
0
0
2
1
2
0
0
2
1
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)
0.7
SSW
15
0.7
SSW
15
0.7
SSW
15
0.7
SSW
14
0.7
SSW
14
0.6
SSW
14
0.8
SSW
15
0.8
SSW
16
0.6
SSW
14
0.6
SSW
14
0.7
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.7
SSW
14
0.6
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.7
SSW
14
0.7
SSW
14
0.6
SSW
14
0.6
SSW
14
0.4
SSW
18
Wave Graph
Metric surfscale
Energy kJ
196
193
188
183
183
136
246
277
125
123
166
233
236
180
180
160
239
236
210
213
213
156
156
105
Wind (km/h)
10
NW
10
NW
5
SW
5
S
0
WSW
5
NW
10
WNW
10
SSW
15
S
5
SW
10
NW
10
NW
5
S
10
S
10
W
15
NW
5
W
10
S
5
S
10
NNW
10
NNW
5
SSW
10
WSW
15
NW
cross-on
cross-on
glassy
glassy
glassy
cross-on
on
cross-on
cross
cross-on
cross-on
cross-on
glassy
cross
on
cross-on
glassy
cross
glassy
cross-on
cross-on
glassy
cross-on
cross-on
High Tide
4:47PM0.94m
4:28AM0.32m
5:35PM0.92m
5:22AM0.29m
6:27PM0.88m
6:27AM0.28m
Low Tide
00:03AM0.14m
10:00AM-0.01m
1:02AM0.15m
10:44AM0.03m
2:04AM0.15m
11:33AM0.09m
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
clear
rain showers
rain showers
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:47
5:47
5:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:52
6:53
1
1
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
Temp °C
27
26
26
26
26
26
27
26
27
26
25
25
25
25
26
26
26
26
25
25
24
25
26
26
30
28
30
30
30
29
30
29
29
30
28
28
29
28
28
28
30
28
28
27
26
28
28
28
Swell 1
Height (m)
Direction
Period (s)
0.7
SSW
15
0.7
SSW
15
0.7
SSW
15
0.7
SSW
14
0.7
SSW
14
0.6
SSW
14
0.8
SSW
15
0.8
SSW
16
0.6
SSW
14
0.6
SSW
14
0.7
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.7
SSW
14
0.6
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.7
SSW
14
0.7
SSW
14
0.6
SSW
14
0.6
SSW
14
0.5
SSW
14
Energy kJ
196
193
188
183
183
136
246
277
125
123
166
233
236
180
180
160
239
236
210
213
213
156
156
105
Swell 2
Height (m)
Direction
Period (s)
0.4
SW
21
0.3
S
6
0.4
S
10
0.3
S
10
0.3
SSW
18
0.4
SSW
17
0.4
SW
19
0.4
SW
19
0.4
SSW
16
0.3
SSW
16
0.3
SSW
16
0.2
SSW
18
0.4
SW
18
0.4
SSW
17
0.4
SSW
17
0.4
SSW
17
0.3
SSW
10
0.1
NW
11
0.2
S
10
0.2
SSW
16
0.3
SW
16
0.4
SSW
18
0.3
SSW
18
0.4
SSW
18
Energy kJ
117
7
33
18
63
101
96
96
87
51
51
31
80
101
99
101
18
5
7
25
41
103
62
103
Swell 3
Height (m)
Direction
Period (s)
0.4
SSW
6
0.3
SW
21
0.3
SSW
18
0.3
SSW
18
0.3
S
6
0.3
SW
19
0.2
S
6
0.3
SSW
20
0.3
SSW
20
0.3
SSW
20
0.3
SSW
19
0.2
S
4
0.2
NNW
3
0.4
SW
18
0.3
SW
18
0.2
SSW
18
0.1
SW
18
0.1
W
11
0.1
SW
16
0.2
S
9
0.2
S
9
0.3
SW
16
0.2
SSW
16
0.2
SSW
16
Energy kJ
12
72
62
61
6
59
3
75
75
75
72
1
1
80
49
31
12
2
10
7
6
41
25
25
Wind waves
Height (m)
Direction
Period (s)
0.3
S
10
0.1
NW
9
0.4
NW
3
0.3
SSW
10
0.4
NNW
3
0.3
SSW
10
0.3
SW
6
0.2
WSW
6
Energy kJ
17
3
2
18
3
18
6
4
Nearest Offshore or Glassy
Rating
(10 max)
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
1
Distance (km)
52
52
0
0
0
11
125
125
1
13
96
94
0
1
125
138
0
1
0
6
6
0
128
138
Best forecast wave conditions in Big Island
Rating
(10 max)
2
3
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
3
4
5
4
4
3
4
4
4
4
3
4
4
3
4
3
4
4
4
4
3
2
1
1
Header Global
Rating
(10 max)
4
6
5
4
4
5
5
4
4
4
4
4
4
4
4
4
5
5
4
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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