Kapoho Bay Surf Break

Lat Long: 19.50° N 154.82° W

Kapoho Bay Surf Forecast and Surf Report

Issued: 7 am 18 Sep 2026 (local time)

Forecast update in  hr  min

Today's Kapoho Bay sea temperature is
27.4°C
0.7° 

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


Kapoho Bay surf forecast from 18 Sep 2026:

  • Most powerful swell: Wednesday 23 Sep, 2AM (local time) - 8ft (2.4m), 9s period, E swell with 950 kJ wave energy.

Best Forecast Surf Conditions for Kapoho Bay this week:

The most powerful waves expected at Kapoho Bay in the next 16 days are 2.4m 9s and forecast to arrive on Wednesday (Sep 23) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 6s period and expected on Sunday (Sep 20) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Wed 23rd Sep)8ft (2.4m) 9s

Table - best surf conditions forecast for Kapoho Bay over the next 16 days.


Short Range Forecast

Light rain (total 2mm), mostly falling on Sun night. Warm (max 27°C on Fri morning, min 25°C on Sat night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 47mm), heaviest during Mon night. Warm (max 27°C on Tue morning, min 25°C on Mon morning). Wind will be generally light.

Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
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
0
0
0
0
0
0
1
0
1
1
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)
1.9
E
8
1.9
E
8
1.9
E
8
1.9
E
8
1.9
ENE
8
1.8
E
9
1.8
ENE
9
1.8
ENE
9
1.9
ENE
9
2.2
ENE
9
2.1
ENE
9
2.1
ENE
8
2.2
E
9
2.3
E
9
2.4
E
9
2.2
E
9
2.1
E
9
2
E
9
2.1
E
8
1.9
E
8
1.8
E
8
Wave Graph
Metric surfscale
Energy kJ
481
481
505
524
534
506
516
466
506
708
632
588
758
847
950
840
723
613
626
499
439
Wind (km/h)
20
ENE
20
ENE
15
NE
25
ENE
20
NE
20
NE
25
NNE
25
NNE
25
NNE
25
NNE
25
NE
15
ENE
20
ENE
20
ENE
20
ENE
25
NE
25
NE
20
ENE
25
NE
25
ENE
15
NE
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
High Tide
9:18AM0.72m
11:00AM0.74m
10:45PM0.39m
12:00PM0.79m
00:07AM0.45m
12:39PM0.84m
00:47AM0.52m
1:10PM0.88m
1:21AM0.61m
1:37PM0.91m
1:53AM0.70m
2:04PM0.91m
2:26AM0.79m
Low Tide
1:37AM0.29m
7:42PM0.37m
3:54AM0.30m
7:27PM0.33m
5:21AM0.27m
7:36PM0.28m
6:16AM0.23m
7:50PM0.23m
7:00AM0.19m
8:07PM0.18m
7:41AM0.17m
8:26PM0.14m
cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
rain showers
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:07
6:07
6:07
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:19
6:17
6:16
6:15
6:15
6:14
6:13
 mm
2
2
3
19
6
2
7
2
1
5
1
2
2
Temp °C
27
27
26
27
26
26
26
26
26
26
26
26
27
27
26
26
26
25
26
26
25
Feels °C
27
27
26
26
25
26
25
25
25
26
26
28
28
28
27
27
26
26
26
26
24
  • 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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Information about the Kapoho Bay Surf forecast

The above surf forecast table for Kapoho Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kapoho Bay can be found by selecting the local surf guide option on the grey menu. Our Kapoho Bay 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 (Kapoho Bay) 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 Kapoho Bay 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.

Kapoho Bay is 37 km (23 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.

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