Waiaha Rivermouth / Honls Surf Break

Lat Long: 19.63° N 155.99° W

Waiaha Rivermouth / Honls Surf Forecast and Surf Report

Issued: 1 am 25 Jul 2026 (local time)

Forecast update in  hr  min

Today's Waiaha Rivermouth / Honls sea temperature is
26.9° C
0.7° 

Waiaha Rivermouth / Honls surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Waiaha Rivermouth / Honls surf forecast from 25 Jul 2026:

  • Best quality surf: Saturday 25 Jul, 8AM (local time) - 2.5ft (0.8m), 19s period, SSW swell with glassy winds.
  • Most powerful swell: Saturday 25 Jul, 2PM (local time) - 3.5ft (1.0m), 18s period, SSW swell with 692 kJ wave energy.
  • Next surfable swell (1★+): Saturday 25 Jul, 8AM (local time) - 2.5ft (0.8m), 19s period with SSW swell.

Best Forecast Surf Conditions for Waiaha Rivermouth / Honls this week:

The surf forecast for Waiaha Rivermouth / Honls over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jul 25) at 8AM. The primary swell is predicted to be 0.8m and 19s period with a secondary swell of 0.7m and 16s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Waiaha Rivermouth / Honls in the next 16 days are 1.0m 18s and forecast to arrive on Saturday (Jul 25) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Sunday (Jul 26) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Sat 25th Jul)2.5ft (0.8m) 19s
Best Surf 8AM (Sat 25th Jul)2.5ft (0.8m) 19s
Most Powerful 2PM (Sat 25th Jul)3.5ft (1.0m) 18s

Table - best surf conditions forecast for Waiaha Rivermouth / Honls over the next 16 days.


The Lowdown

Alright, folks, Rusty here. Let’s have a look at what’s cooking for this little corner of the lineup.

Right off the bat, I gotta be straight with you – the next 16 days are looking pretty flat and frustrating. We’ve got a lot of days with barely a ripple, and the best we can hope for is a few small, clean windows. The only real consistent spot on offer is Waiaha Rivermouth / Honls, a tricky reef break for advanced surfers only. It’s exposed to the SSW swell, which is what we’ll be seeing.

The water temperature is sitting at 80°, which is a touch warmer than average for this time of year – nothing crazy, but you might not need that thick wetsuit.

Okay, let’s walk through the week. The best of the bunch is coming right up on Saturday, July 25th. We’ve got a solid 2ft SSW groundswell rolling in with a very long 20-second period. That’s a lot of energy (843) for such a small wave. The wind is light and offshore from the SW in the morning, making for clean, glassy conditions. It’s small, but for the advanced crew, Honls will have some real quality lines. That Saturday morning session is the standout.

The swell drops a bit through Sunday and into Monday, but the wind stays light. Monday afternoon on July 27th actually turns glassy, and we get some clean 3ft waves with a 14-second period. It’s a small window, but it’s surfable. Tuesday the 28th is also worth a mention – morning has a clean offshore cross-off wind from the NNW, and the waves hold at 2ft. By Tuesday afternoon, it goes dead glassy again. These are the best sessions, but they’re all small.

After that, it gets ugly. From Wednesday the 29th onwards, the waves get smaller and the wind turns onshore or cross-shore, making a mess of things. There’s a long stretch of days with poor conditions and weak energy. We get a tiny blip of glassy conditions on Wednesday, August 5th, but the swell is only 1ft – it’s basically a lake.

The second week is a write-off. The swell tries to pick up a little around August 9th with a long-period 19-second SSW swell, but the energy is still moderate (416) and the wind is onshore. It’s a long way out, so it’s not something to bank on, but it’s the only sign of life in the distance.

So, bottom line: if you’re an expert who can make the most of small, clean, long-period groundswell, you’ve got a couple of windows this weekend and early next week. For everyone else, it’s looking like a good time to wax the longboard and take a nap.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Wed afternoon. Warm (max 28°C on Tue morning, min 25°C on Thu night). Wind will be generally light.

Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
31
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
2
2
2
2
1
2
2
2
2
0
0
1
1
0
1
1
1
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)
0.9
SSW
16
1
SSW
18
1
SSW
18
1
SSW
16
1
SSW
16
0.8
SSW
16
0.9
SSW
15
0.8
SSW
14
0.7
SSW
14
0.7
SSW
14
0.7
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
13
0.8
SSW
13
0.4
SW
18
0.7
S
13
0.5
SW
16
0.5
SW
16
0.5
SW
15
0.5
SW
15
Wave Graph
Metric surfscale
Energy kJ
395
662
655
554
547
320
309
280
210
198
207
247
243
178
222
121
166
129
124
112
106
Wind (km/h)
5
SW
10
WNW
10
SSE
10
WSW
10
SW
0
S
5
W
5
WNW
5
SSE
15
NNW
0
SW
15
SSW
10
SW
20
NNW
10
S
20
NW
10
SSW
5
NW
10
WNW
10
S
5
SSE
Wind State
on
cross-on
cross
cross-on
on
glassy
cross-on
glassy
glassy
cross-off
glassy
cross-on
on
cross-off
cross-on
cross
cross-on
cross
cross
cross-on
glassy
High Tide
1:55PM0.69m
1:23AM0.22m
2:31PM0.71m
2:10AM0.23m
3:05PM0.73m
2:51AM0.25m
3:36PM0.73m
3:30AM0.27m
4:06PM0.73m
4:09AM0.29m
4:35PM0.70m
4:51AM0.32m
5:04PM0.66m
Low Tide
9:26PM0.13m
6:52AM0.02m
9:55PM0.11m
7:34AM0.01m
10:23PM0.10m
8:13AM0.01m
10:49PM0.09m
8:51AM0.02m
11:14PM0.08m
9:29AM0.04m
11:38PM0.07m
10:10AM0.07m
00:02AM0.06m
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:58
5:58
5:58
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:02
7:01
7:01
7:00
7:00
7:00
 mm
1
1
Temp °C
27
27
26
27
26
26
28
28
27
28
28
27
28
28
27
27
27
27
27
28
26
Feels °C
30
29
28
29
28
30
30
30
31
31
31
32
31
30
30
28
29
30
29
31
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 Waiaha Rivermouth / Honls Surf forecast

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

Waiaha Rivermouth / Honls is 95 km (59 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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