Sandy Beach Surf Break

Lat Long: 21.29° N 157.67° W

Sandy Beach Surf Forecast and Surf Report

Issued: 7 am 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Sandy Beach sea temperature is
27.3°C
0.4° 

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 12 Sep 2026:

  • Most powerful swell: Thursday 17 Sep, 8PM (local time) - 7.5ft (2.3m), 10s period, ENE swell with 983 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 2.3m 10s and forecast to arrive on Thursday (Sep 17) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 18s period and expected on Wednesday (Sep 16) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Thu 17th Sep)7.5ft (2.3m) 10s

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


The Lowdown

Alright folks, Rusty here with a long hard look at what Sandy Beach has in store. I gotta be straight with you – this is a tough stretch for paddlers. The whole 16-day window is littered with strong cross-shore winds and messy conditions, and the first real chance of anything worthwhile doesn’t show up until the very end.

We kick off starting Saturday, September 12th right through the middle of the week, and there’s just nothing doing. The swell is small, bumpy, and we’re stuck with a persistent cross-breeze that’s chopping everything up. The combined energy is moderate at best – bouncing around the 120 to 200 mark – but with 12 to 16 mph winds never letting up, the surface is just junk. Even on Sunday morning of the 13th, with a 3-ft NE swell pushing in, the cross-shore wind kills any chance of a clean face.

By Wednesday, September 16th, things start to get some size, but it comes with a penalty. That afternoon, a long-period 18-second SSW groundswell rolls in showing strong energy of 831, but it’s sloppy. The water’s about average for the time of year at 81° – nothing weird there – but the 22 mph cross-wind keeps the waves lumpy and hard to read. Not worth suiting up.

Thursday the 17th and Friday the 18th see the swell really pumping, with heights over 7 ft and combined energy cracking the 1000 mark. That’s strong stuff. But the wind is still ripping between 19 and 25 mph, cross-shore or cross-onshore, and the wave comment says it all: poor. For a beach and reef setup like Sandy Beach, with this much wind and size, my honest call is that this setup looks more interesting for kite surfing than paddle surfing. If you’re a beginner, stay well clear – 7-ft waves with messy wind is expert territory only.

The pattern holds steady through the next week. Size comes and goes, but the ENE trades don’t let up. The closest we get to something rideable is on Wednesday, September 23rd. You’ve got a solid 7-ft swell from the East with a 10-second period, and the wind finally drops to a moderate 12-16 mph. The combined energy is strong at 958. It’s still cross-shore, but the conditions are described as “marginal” rather than poor. That’s your best option in the whole run – the only day that gets a score above zero. It’s not a standout by any stretch, but if you’re desperate for a paddle, that Wednesday might give you a few lumpy, workable runners.

After that, the final weekend of September just fades back into small, windy mush. So, to sum it up: a long, ugly blank run for most of the month, with a single, okay window on the 23rd. Not our finest period.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Thu night. Warm (max 26°C on Tue morning, min 25°C on Tue morning). Mainly fresh winds.

Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
AM
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
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
ENE
10
0.7
ENE
10
0.8
NNE
9
0.8
NNE
9
0.8
NNE
9
0.7
NE
9
0.6
NE
8
1.1
NE
8
0.9
NE
8
0.4
E
12
1.1
NE
8
0.8
SSW
19
1.5
ENE
6
0.9
SSW
18
0.8
SSW
17
2.2
ENE
8
2.2
ENE
10
2.2
ENE
9
2
E
9
1
SSW
17
1
SSW
16
Wave Graph
Metric surfscale
Energy kJ
128
98
99
99
99
79
58
171
107
46
133
470
156
541
377
570
923
758
646
580
539
Wind (km/h)
20
ENE
25
NE
20
ENE
20
ENE
25
NE
20
ENE
25
ENE
25
NE
20
ENE
25
ENE
30
NE
25
NE
35
NE
35
NE
35
ENE
40
NE
35
NE
30
ENE
20
ENE
15
ENE
15
ENE
Wind State
cross
cross
cross-on
cross
cross
cross
cross-on
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross
High Tide
3:42PM0.51m
4:32AM0.57m
4:10PM0.44m
5:15AM0.59m
4:37PM0.37m
6:02AM0.58m
5:04PM0.30m
6:56AM0.56m
5:30PM0.25m
8:04AM0.54m
6:18PM0.21m
9:21AM0.54m
9:37PM0.19m
Low Tide
10:05AM0.12m
10:11PM0.04m
10:58AM0.16m
10:34PM0.05m
11:57AM0.20m
10:58PM0.06m
1:10PM0.23m
11:24PM0.09m
2:59PM0.23m
11:56PM0.11m
5:49PM0.21m
00:44AM0.14m
6:28PM0.17m
2:11AM0.15m
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:16
6:16
6:16
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:36
6:35
6:34
6:32
6:31
6:30
6:30
 mm
3
3
4
2
Temp °C
25
25
25
25
25
25
25
25
25
26
26
26
26
26
26
26
26
26
26
26
26
Feels °C
25
24
24
26
24
24
24
23
24
27
25
26
25
24
25
24
24
25
26
27
27
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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