Sandy Beach Surf Break

Lat Long: 21.29° N 157.67° W

Sandy Beach Surf Forecast and Surf Report

Issued: 1 am 06 Sep 2026 (local time)

Forecast update in  hr  min

Today's Sandy Beach sea temperature is
27.1°C
0.2° 

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


Sandy Beach surf forecast from 6 Sep 2026:

  • Most powerful swell: Monday 7 Sep, 11AM (local time) - 8ft (2.4m), 12s period, ENE swell with 1,703 kJ wave energy.

Best Forecast Surf Conditions for Sandy Beach this week:

The most powerful waves expected at Sandy Beach in the next 16 days are 2.4m 12s and forecast to arrive on Monday (Sep 07) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 14s period and expected on Monday (Sep 07) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11AM (Mon 7th Sep)8ft (2.4m) 12s

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


The Lowdown

Alright, this is Rusty. Let’s take a hard look at what we’ve got for Sandy Beach over the next couple of weeks. I’ll be straight with you – the forecast is a bit of a rough one for paddle surfing.

The whole run starts off rough and stays pretty average for a long stretch. We’re looking at a solid gap of poor conditions, with the first real glimmer of something different showing up only on September 9th. But even that is marginal at best.

From the get-go on September 6th, Sunday morning, it’s a write-off. We’ve got a 7ft swell from the ENE with a 12-second period, but it’s being hammered by a 19 mph cross-onshore wind from the ENE. The combined swell energy is high, reading 1951, but with that wind it’s just lumpy, messy, and poor. The water temp is about average for this time of year. Sunday afternoon, Monday, and Tuesday are more of the same – decent swell size but always with that cross-onshore or cross wind making a mess of things. The energy values stay high, between 1889 and 2233, but it’s not surfable for a paddle board. Honestly, with that much wind and that kind of chop, this setup looks more interesting for kite surfing than traditional surfing.

Wednesday September 9th morning is the first sign of a change. The swell drops to 3ft from the SSW, with a long 14-second period. The combined energy drops to 526, which is weak. The wind is a light cross-onshore from the ESE at 6 mph. It’s still just a marginal surf forecast, with only a score of 1 out of 10. It’s not good, just less bad than everything else.

Thursday the 10th through September 16th is a long, bleak stretch. Swell hangs around from the ENE, mostly between 3ft and 5ft, but the wind never lets up. It’s a constant cross or cross-onshore breeze from the ENE or NE, with speeds picking up to 19, 22, and even 25 mph. The combined energy values stay in the moderate to weak range, from 140 up to 773, but the wind just ruins any chance of a clean wave. The swell period is short, around 7 to 8 seconds, which is just poor quality, weak windswell. Everything is labelled “poor surf conditions.” This is a proper drought.

Then from September 17th through the 21st, the swell direction swings to the SSW, with a long period of 14 to 18 seconds. The swell height is small, between 2ft and 4ft. The combined energy sits in the moderate range, from 385 to 773. But here’s the killer – the wind is still howling from the ENE and NE at 19 to 25 mph, which is cross-shore. So while that long-period groundswell from the SSW is a promising sign for points and reefs in theory, here at Sandy Beach, which is a beach and reef setup, the strong cross-shore wind just makes it lumpy and messy. It’s still labelled as poor.

The only real stand-out, and I’m using that term loosely, is that Wednesday morning on September 9th. It’s the only time the wind drops to a light breeze and the conditions aren’t a total disaster. But it’s a 3ft marginal wave. It’s not a classic day.

So, the honest truth for Sandy Beach: there’s no true standout. The best bet is to keep an eye on that Wednesday the 9th for a small window of cleaner, but still marginal, surf. After that, it’s a long wait. Conditions like this are fairly normal for the area when the trade winds lock in, so this kind of blank run isn’t unusual. Forecasts can change, so don’t lose hope entirely, but for now, it’s a tough watch.

Rusty.

Short Range Forecast

Heavy rain (total 31mm), heaviest during Sun night. Warm (max 27°C on Mon afternoon, min 25°C on Sun night). Winds decreasing (fresh winds from the SSE on Mon night, light winds from the SSE by Tue night).

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Wed night. Warm (max 27°C on Wed morning, min 25°C on Thu afternoon). Winds increasing (light winds from the ESE on Wed morning, fresh winds from the ENE by Thu afternoon).

Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
0
0
0
0
0
0
1
2
1
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)
2.1
ENE
12
1.9
ENE
12
2.3
ENE
12
2.4
ENE
12
2.3
ENE
12
1.9
ENE
12
1.7
ENE
11
1.7
ENE
11
1.3
ENE
10
0.9
SSW
14
0.9
SSW
13
0.7
SSW
13
0.6
SSW
16
1.3
ENE
7
1.4
ENE
7
1.7
ENE
7
1.6
ENE
7
1.7
ENE
7
1.5
ENE
10
1.5
ENE
10
1.6
ENE
6
Wave Graph
Metric surfscale
Energy kJ
1240
1064
1461
1703
1461
950
680
604
356
269
257
176
179
158
186
249
256
234
445
439
190
Wind (km/h)
30
ENE
30
ENE
20
E
30
E
30
SE
35
SSE
25
S
15
S
10
SSE
10
ESE
20
ENE
20
ENE
25
ENE
30
NE
30
ENE
30
ENE
30
NE
30
ENE
30
NE
30
NE
35
ENE
Wind State
cross
cross
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross
cross
cross
cross
cross
cross-on
cross
cross
cross
High Tide
12:00PM0.71m
00:14AM0.26m
12:48PM0.73m
1:03AM0.31m
1:30PM0.72m
1:48AM0.38m
2:07PM0.69m
2:29AM0.44m
2:41PM0.65m
3:11AM0.50m
3:13PM0.59m
3:51AM0.55m
3:42PM0.51m
4:32AM0.57m
Low Tide
7:41PM0.09m
5:40AM0.04m
8:09PM0.07m
6:40AM0.03m
8:36PM0.05m
7:34AM0.03m
9:01PM0.04m
8:25AM0.05m
9:26PM0.04m
9:14AM0.08m
9:49PM0.03m
10:05AM0.12m
10:11PM0.04m
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
clear
thunderstorm
clear
clear
rain showers
rain showers
part cloud
clear
clear
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:15
6:15
6:15
6:16
6:16
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:42
6:40
6:39
6:38
6:37
6:37
6:36
 mm
3
11
4
4
5
2
2
1
1
Temp °C
26
26
26
26
27
27
27
27
27
27
27
26
26
26
25
25
25
25
25
25
25
Feels °C
25
25
26
25
27
27
27
28
30
31
29
27
26
25
23
23
23
23
23
23
22
  • 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 Sandy Beach Surf forecast

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

Sandy's Beach is 15 km (9 miles) from the city of Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.

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