Sandy Beach Surf Break

Lat Long: 21.29° N 157.67° W

Sandy Beach Surf Forecast and Surf Report

Issued: 7 am 12 Aug 2026 (local time)

Forecast update in  hr  min

Today's Sandy Beach sea temperature is
27.0° 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 13 Aug 2026:

  • Most powerful swell: Sunday 16 Aug, 8AM (local time) - 16ft (5.0m), 10s period, E swell with 5,514 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 5.0m 10s and forecast to arrive on Sunday (Aug 16) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 16s period and expected on Wednesday (Aug 19) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8AM (Sun 16th Aug)16ft (5.0m) 10s

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


The Lowdown

Alright, this is Rusty. Let’s be straight with you – the next two weeks are a tough watch for Sandy Beach. The whole 16-day window is a real struggle, with zero decent surf on the cards. We’re looking at a solid two-week stretch with nothing worth paddling out for.

Kicking off from Wednesday, August 12th, it’s a write-off. The wind is hammering from the ENE at 18 to 22 mph, all cross-shore, making for lumpy, choppy conditions. Even though there’s a long-period groundswell rolling in from the south at 3 to 4 ft with a period of 15-18 seconds, the wind just trashes it. The combined energy is moderate (around 869 to 889), but the “poor surf conditions” tag says it all. Water temp is sitting at a very normal 81°.

Moving into Friday the 14th, the swell bumps up a bit – 7 to 7 ft from the ENE, but the period drops right off to a weak 7-8 seconds. That’s short-period windswell, and with the same 22 mph cross-shore wind, it’s just messy. The energy is still moderate (854 to 918), but no one’s having fun.

Saturday the 15th gets ugly. Swell jumps to 10 to 12 ft from the ENE, with energy climbing into the strong range (1729 to 2182). But the wind is howling at 28 to 31 mph cross-shore, and the period is still short. This is big, blown-out, dangerous junk. By Sunday the 16th, it peaks at 13 ft with a near-gale cross-onshore wind and thunderstorms. That’s expert-only if anything, and even then, it’s more of a survival mission than a surf. Honestly, with that much wind and chop, a kite surfer might get a look, but for a paddle surfer? Forget it.

From Monday the 17th onwards, the swell drops back to 4 to 6 ft, but the wind stays locked in from the ENE at 15-22 mph, mostly cross or cross-onshore. The period is short, 7-8 seconds, so the waves are weak and lumpy. Energy stays low to moderate (149 to 814). This pattern just repeats day after day with no break. Even when the swell direction swings around to the SSW from August 20th onward, with longer periods of 14-18 seconds, the cross-shore wind still ruins it.

There are no standouts here, no hidden gems. The whole 16-day run is a blank. The break is fairly consistent, so it’s a bit unusual to have such a long stretch of poor conditions, but that’s what we’ve got. Hang tight, check back later – forecasts can change.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Wed night, min 25°C on Wed morning). Mainly strong winds.

Days 4-6 Weather Summary

Heavy rain (total 48mm), heaviest during Sun morning. Warm (max 27°C on Sun afternoon, min 24°C on Sun morning). Winds decreasing (gales from the NE on Sat night, light winds from the E by Sun night).

Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
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
1
0
0
0
0
0
0
0
0
0
0
0
1
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)
0.9
S
18
0.9
S
18
1.3
S
16
1
S
16
1.2
S
15
1.1
S
15
2.1
ENE
7
2
ENE
8
2.4
ENE
7
3
ENE
9
3.5
E
9
3.5
ENE
9
4
E
10
3
ENE
9
2.3
ENE
8
1.9
ENE
8
1.7
ENE
8
1.5
ENE
7
1.6
ENE
7
1.4
ENE
7
1.4
ENE
7
Wave Graph
Metric surfscale
Energy kJ
509
498
890
501
662
537
443
477
637
1507
1949
2367
3017
1445
737
438
318
231
239
173
173
Wind (km/h)
30
ENE
35
ENE
30
ENE
35
NE
35
ENE
35
ENE
35
ENE
35
NE
40
ENE
45
NE
50
NE
60
NE
45
E
25
ESE
20
ESE
30
ENE
35
ENE
30
ENE
30
ENE
30
ENE
30
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
High Tide
3:14PM0.76m
3:27AM0.36m
3:49PM0.71m
4:15AM0.41m
4:22PM0.64m
5:04AM0.45m
4:53PM0.55m
5:55AM0.48m
5:21PM0.47m
6:52AM0.50m
5:48PM0.38m
7:56AM0.52m
6:10PM0.31m
Low Tide
8:22AM-0.02m
10:21PM0.04m
9:11AM0.01m
10:50PM0.04m
10:01AM0.07m
11:17PM0.04m
10:54AM0.13m
11:44PM0.05m
11:53AM0.20m
00:11AM0.05m
1:08PM0.25m
00:39AM0.07m
2:59PM0.27m
1:14AM0.09m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:07
6:09
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:01
7:00
7:00
7:00
6:59
6:58
 mm
1
2
27
7
8
2
1
Temp °C
25
25
26
26
26
26
26
26
26
26
26
26
26
27
27
26
26
25
25
25
25
Feels °C
23
22
24
23
23
23
23
23
23
23
22
22
22
27
27
27
24
23
23
23
23
  • 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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