Kua Bay Surf Break

Lat Long: 19.81° N 156.01° W

Kua Bay Surf Forecast and Surf Report

Issued: 1 pm 08 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kua Bay sea temperature is
27.4° C
1.0° 

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


Kua Bay surf forecast from 9 Aug 2026:

  • Best quality surf: Thursday 13 Aug, 8PM (local time) - 3.5ft (1.0m), 6s period, NE swell with cross-offshore winds.
  • Most powerful swell: Thursday 13 Aug, 8PM (local time) - 3.5ft (1.0m), 6s period, NE swell with 68 kJ wave energy.
  • Next surfable swell (1★+): Thursday 13 Aug, 8PM (local time) - 3.5ft (1.0m), 6s period with NE swell.

Best Forecast Surf Conditions for Kua Bay this week:

The surf forecast for Kua Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 13) at 8PM. The primary swell is predicted to be 1.0m and 6s period with a secondary swell of 0.2m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Kua Bay in the next 16 days are 1.0m 6s and forecast to arrive on Thursday (Aug 13) 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 1.6m 8s period and expected on Saturday (Aug 15) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Thu 13th Aug)3.5ft (1.0m) 6s
Best Surf 8PM (Thu 13th Aug)3.5ft (1.0m) 6s
Most Powerful 8PM (Thu 13th Aug)3.5ft (1.0m) 6s

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


The Lowdown

Alright, let me level with you. It’s been painfully slow out at Kua Bay. We’re looking at a solid run of ankle-biters and closeouts for the next week and a half. The swell is just not showing up, and what’s there is mostly short-period windswell with poor shape. You’d be wasting your time paddling out before the 22nd.

The first few days, starting on the 8th, are basically flat. Waist-high or smaller dribble with a mix of light cross-onshore breezes. It’s calm enough at times, but there’s just no power to it. The energy is weak, readings in the 20s and 30s, and the waves are soft and crumbling. You might as well stay on the beach.

We stay in that same rut right through the middle of the month. The 15th and 16th see the wind pick up strong, with a fresh to strong breeze making things lumpy and cross-chopped. Not good. A bit of a drop in wind on the 17th, but the swell stays tiny and weak. The 18th is glassy at times, but with only 1ft of swell, it’s just not worth the effort.

Honestly, it’s a dead stretch. The wait for a real wave is on.

Now, hold on. We finally see a pulse of energy arrive on the 21st. The swell jumps a bit, with the summary height around 2ft, and the combined energy starts to climb into the triple digits (123). The direction is from the west, which is not the WNW the break really wants, so it’ll be a bit sectiony and lined up oddly. But it’s the first sign of life.

The real standout, and the one you should circle on your calendar, is the Saturday afternoon session on the 22nd of August. The wind goes glassy, completely calm. The swell holds at 2ft from the west with a period of 10 seconds. The combined energy is still moderate (119), but the total lack of wind will make it the cleanest the place has looked in weeks. The forecast notes say "surfable waves but very ordinary conditions," which tells me it’s not going to be epic, but it will be the most fun you’ll have all week. The crowds could be a factor, as it’s always a toss-up there, but with clean conditions, it might be worth sharing a few waves. This is the one to get out for.

After that, the swell looks like it fades back out again. The 23rd drops back down to around 2ft and the cross-on wind comes back. So, enjoy that Saturday, because it’s looking like the only real window in this entire 16-day outlook.

Water temp is sitting at 81°, which is about a degree and a half warmer than average for this time of year. Not a big deal, feels normal.

So there you have it. A long, dry spell, followed by one clean, small-wave window on the 22nd. Don't hold your breath for the rest.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 28°C on Sat afternoon, min 26°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Tue night. Warm (max 29°C on Thu afternoon, min 25°C on Tue night). Wind will be generally light.

Sat
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
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
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)
0.7
NE
5
0.8
NE
6
0.3
W
13
0.3
W
12
0.3
W
12
0.3
W
11
0.3
W
11
0.3
W
10
0.6
NNE
5
0.2
W
10
0.3
SSW
13
0.3
W
11
0.3
WNW
13
0.3
SSW
16
0.3
W
12
1
NE
6
0.2
W
12
0.2
W
11
0.2
W
12
0.2
W
12
Wave Graph
Metric surfscale
Energy kJ
29
0
28
25
23
21
21
18
17
8
0
22
33
0
25
0
11
10
11
11
Wind (km/h)
0
WSW
0
N
10
W
5
WSW
0
WNW
10
WSW
10
WSW
5
E
5
NW
10
SSW
5
NNW
5
NNW
10
SW
0
E
10
NW
10
N
5
NNW
10
NNW
10
N
15
NE
Wind State
glassy
glassy
cross-on
cross-on
glassy
cross-on
cross
glassy
on
cross-off
on
on
cross-off
glassy
on
cross-on
glassy
cross-on
cross-on
cross
High Tide
00:47AM0.29m
1:56PM0.86m
1:52AM0.32m
2:42PM0.90m
2:44AM0.37m
3:22PM0.91m
3:31AM0.43m
4:00PM0.88m
4:16AM0.49m
4:34PM0.83m
5:00AM0.54m
5:06PM0.76m
Low Tide
8:44PM0.19m
6:14AM0.06m
9:17PM0.14m
7:17AM0.03m
9:48PM0.11m
8:12AM0.02m
10:18PM0.09m
9:03AM0.02m
10:47PM0.07m
9:51AM0.05m
11:15PM0.07m
10:38AM0.10m
11:41PM0.07m
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:01
6:01
6:03
6:03
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:57
6:55
6:54
6:54
6:53
6:52
6:52
 mm
2
Temp °C
28
28
28
28
27
28
28
27
28
28
27
28
28
27
28
29
27
29
28
27
Feels °C
30
32
31
31
31
31
31
32
31
31
30
30
30
31
30
32
30
31
30
29
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  • 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 Kua Bay Surf forecast

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

Kua Bay is 97 km (60 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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