Kua Bay Surf Break

Lat Long: 19.81° N 156.01° W

Kua Bay Surf Forecast and Surf Report

Issued: 1 pm 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's Kua Bay sea temperature is
27.7°C
0.9° 

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 11 Sep 2026:

  • Best quality surf: Wednesday 16 Sep, 11PM (local time) - 1.5ft (0.4m), 18s period, SW swell with glassy winds.
  • Most powerful swell: Wednesday 16 Sep, 2PM (local time) - 1.5ft (0.4m), 18s period, SW swell with 109 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 16 Sep, 11PM (local time) - 1.5ft (0.4m), 18s period with SW 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 Wednesday (Sep 16) at 11PM. The primary swell is predicted to be 0.4m and 18s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Kua Bay in the next 16 days are 0.4m 18s and forecast to arrive on Wednesday (Sep 16) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Thursday (Sep 17) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Wed 16th Sep)1.5ft (0.4m) 18s
Best Surf11PM (Wed 16th Sep)1.5ft (0.4m) 18s
Most Powerful 2PM (Wed 16th Sep)1.5ft (0.4m) 18s

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


The Lowdown

G'day, Rusty here. Alright, let's be straight with you: the outlook for Kua Bay over the next sixteen days is a tough one. We've got a long stretch of minimal to no surf, with a few tiny blips that are hardly worth getting the board waxed for. The water temp is sitting at around 82°F which is about average for this time of year, so that's a comfort at least.

The pattern starts pretty flat. From Thursday the 10th of September right through to the evening of Thursday the 17th, it's a wasteland. Swells are tiny—1 ft at best—with poor surf conditions and scores that just don't stack up. You'll see a bit of cross-off wind from the SSW on Thursday afternoon, but the swell is a weak 1 ft from the SW with a long period of 18 seconds. That long period (groundswell) might sound good, but with that little energy (49), it's just not going to hold up. Kua Bay is exposed to the WNW, and the swell is coming from the SW, so it's not ideal. There's a brief glassy moment on Sunday the 13th afternoon with a 2 ft NNE groundswell (period 4 seconds – very short), but the energy is a paltry 19. It's just not enough to make a wave. Then we see a couple of glassy days from Thursday the 17th morning, but the swell is completely absent.

Now, around Friday the 18th of September morning, things get a little more interesting. We see a 1 ft swell from the SW with a very long period of 18 seconds. The combined energy jumps to 108, which is moderate. The wind is a light cross-onshore from the W (6 mph). For a spot like Kua Bay, which is a beach break, that very long period groundswell might make the waves a bit straight and tricky. It's better suited to a point or reef, so just be aware. It's still small, and the poor surf condition rating suggests it's not going to be pretty. After that, the forecast drops back into flatness for the rest of the window.

The best window, if you can call it that, is this first blip on Friday morning the 18th with that moderate energy (108). But honestly, with 1 ft and light cross-onshore wind, it's a desperate call. For the rest of the fortnight, you're looking at long gaps of nothing. There's no standout here. It's a tough run for Kua Bay, and the break is 'fairly consistent', but this forecast is a real dud. Beginners shouldn't worry about anything being too big, and experts will be left staring at a flat ocean. The few tiny swells with moderate energy and very long periods might be more interesting for a kite surfer chasing a gust than a paddle surfer looking for a ride.

Stay patient, and check back soon. Forecasts can change.
Rusty

Short Range Forecast

Light rain (total 9mm), mostly falling on Thu afternoon. Warm (max 28°C on Thu afternoon, min 25°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 28°C on Tue morning, min 25°C on Sun night). Wind will be generally light.

Thu
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
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)
0.3
SW
18
0.3
SW
10
0.3
SW
10
0.4
SW
15
0.4
SW
15
0.4
SW
15
0.3
SW
14
0.3
SW
14
0.3
NNE
3
0.2
W
11
0.2
W
11
0.2
W
10
0.7
NNE
8
0.7
NNE
8
0.2
WSW
9
0.4
SW
19
0.2
WNW
11
0.4
SW
18
0.1
SW
8
0.4
SW
17
Wave Graph
Metric surfscale
Energy kJ
49
16
14
0
0
0
29
29
2
10
9
8
0
0
8
0
11
0
3
0
Wind (km/h)
10
SSW
5
S
10
SW
15
SSW
10
SSW
10
SW
10
SW
5
SSW
5
WSW
0
NW
0
SSW
10
WNW
5
WSW
0
WNW
10
WNW
10
SW
0
W
10
W
5
WSW
0
SSW
Wind State
cross-off
glassy
cross
cross-off
cross-off
cross
cross
cross-off
cross-on
glassy
glassy
on
cross
glassy
cross-on
cross
glassy
cross-on
glassy
glassy
High Tide
3:28PM0.76m
3:57AM0.62m
4:00PM0.70m
4:35AM0.67m
4:29PM0.63m
5:12AM0.70m
4:56PM0.55m
5:50AM0.70m
5:21PM0.47m
6:31AM0.69m
5:43PM0.41m
7:20AM0.66m
5:58PM0.35m
Low Tide
9:55PM0.06m
9:51AM0.11m
10:19PM0.05m
10:36AM0.14m
10:41PM0.06m
11:23AM0.19m
11:04PM0.07m
12:12PM0.23m
11:26PM0.09m
1:09PM0.27m
11:50PM0.11m
2:29PM0.31m
00:17AM0.14m
thunderstorm
thunderstorm
part cloud
rain showers
rain showers
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:30
6:30
6:29
6:28
6:27
6:25
6:24
 mm
3
4
1
1
Temp °C
28
26
26
26
26
26
26
26
27
27
26
27
27
26
28
28
27
28
28
27
Feels °C
31
29
30
29
29
29
29
29
30
30
30
30
30
29
30
31
30
31
31
31
  • Map Icons:
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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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