Sandy Beach Surf Break

Lat Long: 21.29° N 157.67° W

Sandy Beach Surf Forecast and Surf Report

Issued: 1 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 12 Aug 2026:

  • Most powerful swell: Sunday 16 Aug, 5AM (local time) - 18ft (5.5m), 10s period, ENE swell with 5,651 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 5.5m 10s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 16s period and expected on Tuesday (Aug 18) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5AM (Sun 16th Aug)18ft (5.5m) 10s

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


The Lowdown

Alright, Rusty here, and I gotta be straight with you. Looking at the charts for the next 16 days, it's a tough one. We're looking at a long stretch of messy, blown-out conditions with nothing really shaping up as a proper session. The outlook is pretty grim, so don't get your hopes up.

The first window shows nothing on offer right now. We've got a long gap of poor surf conditions starting from Wednesday, August 12th, all the way through. The only spot in the frame is Sandy Beach, a beach and reef setup that's fairly consistent, but that doesn't mean it's good.

Right from the start, Wednesday the 12th is a write-off. The wind is howling from the ENE at 19 mph, creating a lumpy cross-chop. The swell is a weak 3 ft from the south, with a long 18-second period. While long-period groundswell usually means better energy, the combined energy is weak at 892, and the cross-shore wind just kills it. The water temp is sitting at 81°, which is about average for this time of year, so at least you won't be freezing while you're getting skunked.

Thursday the 13th and Friday the 14th are more of the same, with fresh to strong breezes keeping the surface chopped up. The swell gets a little bigger but stays poorly organised. By Saturday the 15th, the swell really kicks up, hitting 10 ft to 12 ft from the ENE, with combined energy surging into the strong range (2,183 to 2,502). But don't get excited. That's a near-gale cross-shore wind, making it a washing machine. At that size, it's strictly for experts only, and even then, the conditions are dangerous and ugly.

Sunday the 16th through to the end of the period is a constant battle. The wind stays on it, mostly cross or cross-onshore, and the swell direction bounces around. We see some south-southwest groundswell pulses popping up around the 20th and again on the 23rd, with periods up to 17 seconds, but the wind is always there to ruin it. The combined energy figures stay low to moderate, usually under 1,000, and it's all labelled "poor surf conditions." The spot is exposed to the swell, but with the wind direction locked in from the east-northeast, it's just not working.

Honestly, this setup looks more interesting for kite surfing than paddle surfing, with all that strong cross-shore wind and lumpy, blown-out surf. You're better off leaving the boards in the shed for now. Sometimes the runs are just like this, and you've got to wait for the next one.

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 31mm), heaviest during Sun morning. Warm (max 27°C on Sun afternoon, min 25°C on Sat morning). Winds decreasing (gales from the ENE on Sun morning, light winds from the ESE 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
0
0
0
0
0
0
0
0
0
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)
0.9
S
18
0.9
S
18
1
S
16
1
S
16
1.2
S
15
1.1
S
15
1
S
14
1.9
ENE
8
2.4
ENE
8
3
ENE
11
3.5
E
10
4
ENE
10
3.5
E
10
2.5
ENE
9
2.1
ENE
8
1.9
ENE
8
1.8
ENE
8
1.5
ENE
7
1.6
ENE
7
1.6
ENE
7
1.6
ENE
6
Wave Graph
Metric surfscale
Energy kJ
509
498
520
501
662
537
411
441
654
1961
2291
2908
2533
1156
621
438
356
231
239
232
200
Wind (km/h)
30
ENE
35
ENE
30
ENE
35
NE
35
ENE
40
ENE
40
NE
35
NE
40
ENE
45
NE
45
NE
55
NE
50
E
30
ESE
20
ESE
20
E
30
ENE
35
ENE
35
ENE
30
ENE
25
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
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
clear
rain showers
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
clear
part cloud
<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
3
10
4
8
3
3
Temp °C
25
25
26
26
26
26
26
26
25
26
26
26
26
27
27
27
26
25
25
25
25
Feels °C
23
22
24
24
23
24
23
23
22
23
23
23
22
25
27
28
27
23
22
22
23
  • 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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