Coast Guard surfForecast / HAW – Big Island / USA

information circle16 Day Weather and Surf, issued 1 am Sunday 17 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Coast Guard surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Coast Guard sea temperature is
25.7° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Coast Guard this week:

The most powerful waves expected at Coast Guard in the next 16 days are 2.5m 8s and forecast to arrive on Saturday (May 23) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Tuesday (May 19) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Sat 23rd May)8ft (2.5m) 8s

Table - best surf conditions forecast for Coast Guard over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 25°C on Sun morning, min 23°C on Mon night). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 24°C on Wed morning, min 22°C on Thu night). Mainly strong winds.

Sunday
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Friday
22
Saturday
23
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
ENE
8
1.7
ENE
8
2
ENE
8
2
ENE
8
1.9
ENE
8
1.7
ENE
8
1.8
ENE
6
2.1
ENE
7
1.7
ENE
8
2.1
ENE
8
2.3
ENE
8
2.1
ENE
8
2.3
ENE
8
2.3
ENE
8
2.4
ENE
8
2.2
ENE
8
2.1
ENE
8
2.1
ENE
8
2.2
ENE
8
2.2
ENE
8
2.1
NE
8
Wave Graph
Metric surfscale
Energy kJ
313
394
498
487
411
344
0
383
402
560
672
626
670
731
741
667
573
587
699
682
613
Wind (km/h)
30
ENE
30
ENE
30
E
35
ENE
35
ENE
35
E
35
ENE
35
ENE
35
ENE
40
ENE
40
ENE
40
ENE
40
ENE
45
ENE
45
ENE
40
ENE
45
ENE
40
ENE
40
ENE
40
ENE
40
ENE
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
4:16PM1.00m
3:09AM0.39m
5:05PM0.98m
3:53AM0.36m
5:58PM0.94m
4:50AM0.33m
6:53PM0.88m
6:21AM0.32m
7:50PM0.82m
8:36AM0.34m
8:46PM0.75m
10:35AM0.42m
9:39PM0.69m
Low Tide
8:37AM-0.04m
11:26PM0.29m
9:17AM-0.02m
00:32AM0.29m
10:00AM0.02m
1:45AM0.29m
10:46AM0.09m
2:57AM0.27m
11:39AM0.17m
3:53AM0.25m
12:52PM0.27m
4:33AM0.22m
2:41PM0.36m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:46
5:46
5:45
5:45
5:45
5:43
5:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:53
6:53
6:53
6:54
6:54
6:55
Temp °C
25
25
24
24
25
24
24
25
24
24
24
24
24
24
23
23
24
23
23
24
23
24
23
22
22
23
22
22
22
21
21
20
20
19
19
18
18
18
18
18
19
18
Swell 1
Height (m)
Direction
Period (s)
0.5
SW
14
0.4
SW
14
0.4
SSW
14
0.4
SSW
19
0.4
SW
13
0.4
SW
13
0.4
SSW
14
0.4
SSW
14
0.4
SSW
14
0.4
SSW
14
0.4
SSW
14
0.3
SSW
16
0.3
SSW
13
0.3
SSW
15
0.3
SSW
15
0.3
SSW
14
0.3
SSW
14
0.3
SSW
16
0.3
SSW
16
0.4
SSW
16
0.3
SSW
14
Energy kJ
102
52
81
148
45
44
80
69
81
78
71
51
32
45
42
40
37
52
50
80
41
Swell 2
Height (m)
Direction
Period (s)
0.3
SSW
16
0.4
SW
21
0.2
S
21
0.4
SW
13
0.3
SSW
14
0.3
SSW
16
0.4
SW
18
0.3
SSW
17
0.2
SSW
16
0.3
SW
16
0.2
NNW
12
0.3
SSW
13
0.3
SSW
16
0.2
SSW
12
0.2
S
12
0.2
S
18
0.2
S
18
0.3
SSW
13
0.2
SSW
13
0.1
N
11
0.1
N
11
Energy kJ
50
117
36
44
40
53
80
59
25
41
13
34
51
14
11
25
24
34
17
2
2
Swell 3
Height (m)
Direction
Period (s)
0.2
NNW
11
0.3
SSW
16
0.1
N
10
0.3
SSW
15
0.3
SW
19
0.3
SSW
14
0.3
SSW
18
0.2
SSW
14
0.1
N
13
0.2
NNW
12
0.1
SW
16
0.2
NNW
11
0.2
NNW
10
0.1
N
10
0.1
N
10
0.1
S
14
0.1
S
11
0.1
NW
12
0.1
NW
11
0.1
N
18
0.1
N
16
Energy kJ
11
50
2
44
59
40
60
18
3
14
10
12
11
2
2
4
2
5
5
6
5
Wind waves
Height (m)
Direction
Period (s)
1.5
ENE
8
1.7
ENE
8
2
ENE
8
2
ENE
8
1.9
ENE
8
1.7
ENE
8
1.8
ENE
6
2.1
ENE
7
1.7
ENE
8
2.1
ENE
8
2.3
ENE
8
2.1
ENE
8
2.3
ENE
8
2.3
ENE
8
2.4
ENE
8
2.2
ENE
8
2.1
ENE
8
2.1
ENE
8
2.2
ENE
8
2.2
ENE
8
2.1
NE
8
Energy kJ
313
394
498
487
411
344
222
383
402
560
672
626
670
731
741
667
573
587
699
682
613
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
2
2
2
2
2
1
1
1
1
1
2
1
1
2
2
1
1
1
Distance (km)
70
23
65
70
70
65
70
73
70
70
54
70
79
65
54
73
75
70
79
65
54
Best forecast wave conditions in Big Island
Rating
(10 max)
2
1
2
2
2
2
2
2
2
2
2
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
2
4
5
4
3
4
3
3
5
4
3
3
3
4
3
2
2
2
1
2
3
Header Global
Rating
(10 max)
6
4
5
4
4
4
4
4
4
5
4
5
5
4
4
5
6
4
5
4
4
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Coast Guard Surf forecast

The above surf forecast table for Coast Guard provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Coast Guard can be found by selecting the local surf guide option on the grey menu. Our Coast Guard surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Coast Guard) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Coast Guard may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Coast Guard is 84 km (52 miles) from Kihei. If you plan a vacation in Big Island, look for hotels and other accommodation in Kihei. Kihei has rooms for a wide range of budgets as well as car hire and transport links.

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