Manini Beach Surf Break

Lat Long: 19.47° N 155.93° W

Manini Beach Surf Forecast and Surf Report

Issued: 7 pm 15 Sep 2026 (local time)

Forecast update in  hr  min

Today's Manini Beach sea temperature is
27.8°C
1.0° 

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


Manini Beach surf forecast from 16 Sep 2026:

  • Best quality surf: Friday 18 Sep, 2AM (local time) - 3ft (0.9m), 17s period, SSW swell with glassy winds.
  • Most powerful swell: Friday 18 Sep, 2AM (local time) - 3ft (0.9m), 17s period, SSW swell with 475 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 16 Sep, 8PM (local time) - 2.5ft (0.7m), 18s period with SW swell.

Best Forecast Surf Conditions for Manini Beach this week:

The surf forecast for Manini Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 16) at 8PM. The primary swell is predicted to be 0.7m and 18s period with a secondary swell of 0.2m and 11s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Manini Beach in the next 16 days are 0.9m 17s and forecast to arrive on Friday (Sep 18) at 2AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 6s period and expected on Tuesday (Sep 22) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Wed 16th Sep)2.5ft (0.7m) 18s
Best Surf 2AM (Fri 18th Sep)3ft (0.9m) 17s
Most Powerful 2AM (Fri 18th Sep)3ft (0.9m) 17s

Table - best surf conditions forecast for Manini Beach over the next 16 days.


The Lowdown

Alright, Rusty here. Let’s get straight into it, yeah? Things are looking pretty quiet for Manini Beach over the next two weeks. Not much in the way of proper swell to get excited about, but there are a couple of windows where the conditions could come together for a sneaky session.

We kick off right away on Wednesday the 16th with a small 2ft south-west swell rolling in. It's packing some serious grunt for its size, with that very long period of 18 seconds and combined energy of 343 (moderate). The wind’s light and onshore first thing, so it’s not clean, but it’s surfable. The water temp is right where you’d expect for this time of year, no weird anomalies.

Thursday the 17th sees the same size swell, but the period drops a touch to 16 seconds and the energy picks up to 500 (moderate). Winds stay cross-onshore, keeping it a bit bumpy. Friday the 18th is more of the same story – 2ft swell from the south-west, 17-second period, energy at 458 (moderate), but again, that light cross-onshore breeze messes with the surface.

Saturday the 19th, we get a slight shift. Swell drops to 2ft from the south, period is a very long 18 seconds, and energy is 450 (moderate). The wind is light cross-onshore in the morning, so it’s not perfect but there’s potential for a wave or two if you’re keen.

Now here’s where it gets interesting. Monday the 21st is the standout. Monday afternoon is your best bet in the whole forecast. The swell is still small at 3ft from the south-south-west, period is 13 seconds, energy is 275 (moderate), but the wind goes glassy. Absolutely flat calm. That’s the gold right there. Just tiny, clean little peelers on the reef for a beginner-friendly session with no hassle. Crowds are ‘sometimes’, so you might have company, but with such small waves, it won’t be a zoo.

Tuesday the 22nd is similar. Swell drops to 2ft from the south, period 12 seconds, energy 200 and 233 (moderate), and again, glassy conditions both morning and afternoon. Another lovely window for a small-board grovel session. Wednesday the 23rd morning stays glassy with a 2ft south swell, 13-second period, energy 255 (moderate). But the afternoon gets absolutely hammered by a near gale – avoid that.

After that, the surf quality takes a dive. Thursday the 24th morning is glassy again with 2ft, but the wind goes bad in the afternoon and stays rubbish for days. A moderate breeze from the south-south-west kicks up a cross-chop from the 25th right through to the 27th. The swell does nudge up to 3ft on Saturday the 26th, but with that wind, it’s messy and uninviting.

The final few days of September into October 1st are a write-off. Tiny 2ft to 2ft swell, weak energy, and either onshore winds or just no power.

So there you have it. It’s not a pumping fortnight by any stretch. The real highlights are Monday the 21st afternoon, through to Wednesday the 23rd morning – glassy conditions with tiny, clean waves. Perfect for a beginner or someone wanting a mellow paddle. The rest is mostly a bust, with a solid run of poor surf from the 25th to the 1st of October. Keep your eyes peeled, though – forecasts can always flick a surprise.

Rusty.

Short Range Forecast

Heavy rain (total 22mm), heaviest during Thu afternoon. Warm (max 29°C on Wed morning, min 27°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 6mm), mostly falling on Fri night. Warm (max 28°C on Sat morning, min 26°C on Sat night). Wind will be generally light.

Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
2
2
0
3
1
2
2
1
1
1
0
1
2
1
2
2
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
SW
19
0.7
SW
18
0.7
SW
18
0.7
SW
17
0.7
SW
16
0.7
SW
16
0.9
SSW
17
0.7
SW
17
0.7
SW
17
0.8
SSW
15
0.6
S
18
0.9
SSW
16
0.8
SSW
16
0.8
SSW
15
0.8
SSW
15
0.8
SSW
14
0.8
SSW
13
0.8
SSW
13
0.7
SSW
13
Wave Graph
Metric surfscale
Energy kJ
372
319
316
298
251
261
475
305
298
270
225
371
346
292
288
265
239
232
173
Wind (km/h)
5
NW
10
W
5
SSW
5
NW
10
WSW
10
NNW
5
NNE
10
SW
10
NW
5
NW
5
SW
15
NW
10
S
10
W
5
WSW
5
SSE
10
W
5
SW
5
N
Wind State
cross-on
on
cross-on
glassy
cross-on
cross-on
glassy
cross-on
cross-on
glassy
cross-on
cross-on
cross
on
cross-on
glassy
on
glassy
glassy
High Tide
7:31AM0.54m
5:38PM0.35m
8:42AM0.51m
10:29AM0.49m
12:01PM0.51m
11:05PM0.24m
12:53PM0.55m
00:32AM0.28m
1:28PM0.58m
1:13AM0.34m
Low Tide
00:03AM0.05m
1:50PM0.25m
00:30AM0.07m
1:08AM0.10m
2:34AM0.13m
8:36PM0.19m
8:09PM0.17m
6:08AM0.10m
8:14PM0.15m
thunderstorm
clear
rain showers
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
clear
clear
part cloud
clear
clear
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:11
6:11
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:25
6:24
6:23
6:22
6:22
6:21
6:20
 mm
1
1
5
7
2
6
5
1
Temp °C
27
29
29
28
28
28
28
28
28
27
28
28
27
28
28
27
28
28
28
Feels °C
32
32
33
33
32
31
33
32
32
31
32
31
31
31
32
31
31
32
33
  • 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 Manini Beach Surf forecast

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

Manini Beach is 92 km (57 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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