Sandy Beach Surf Break

Lat Long: 21.29° N 157.67° W

Sandy Beach Surf Forecast and Surf Report

Issued: 1 pm 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Sandy Beach sea temperature is
26.9° 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 19 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 11PM (local time) - 2ft (0.6m), 16s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Monday 24 Aug, 11PM (local time) - 8ft (2.5m), 8s period, ENE swell with 681 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 11PM (local time) - 2ft (0.6m), 16s period with SSW swell.

Best Forecast Surf Conditions for Sandy Beach this week:

The surf forecast for Sandy Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 11PM. The primary swell is predicted to be 0.6m and 16s period with a secondary swell of 1.0m and 7s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Sandy Beach in the next 16 days are 2.5m 8s and forecast to arrive on Monday (Aug 24) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Friday (Aug 21) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Thu 20th Aug)2ft (0.6m) 16s
Best Surf11PM (Thu 20th Aug)2ft (0.6m) 16s
Most Powerful11PM (Mon 24th Aug)8ft (2.5m) 8s

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


The Lowdown

Alright, this is a bit of a tough one for the Sandy Beach crew. The whole 16-day window is looking pretty blown out, to be honest.

Right from Tuesday the 18th of August, we’ve got a solid 16 mph cross-shore wind from the NE slapping into a small 3 ft easterly swell. The water is sitting at a normal 80°F for this time of year. It’s just not clean. That same pattern hangs around for days – Wednesday and Thursday morning see a bit of a drop in swell size, but the wind stays on it, keeping the surface messy. The combined energy is weak, sitting around 200-300 (moderate energy) for those early days, but it’s useless with that wind.

Friday the 21st of August offers a little light breeze from the east, but the swell drops to 3 ft and the period is a short 7 seconds, with the energy dipping to just 79 (weak energy). It’s a pass.

Then things get worse. From Saturday the 22nd of August, the wind cranks up to 22 – 25 mph from the ENE and stays there for over a week. The swell builds, sure – by Sunday the 23rd we’re looking at 7 ft of easterly swell with 554 (moderate wave energy), and by Monday the 24th it’s 7 ft with 760 (strong wave energy). But it’s all cross-shore and lumpy. That’s a kite-surfing setup, not a paddle-surfing one. The swell keeps climbing into the next week, hitting 8 ft on Thursday the 27th of August with a massive 1152 (strong wave energy), but the wind is still howling from the ENE at 22 mph. It’s a washing machine.

There’s a glimmer of hope right at the very end. On Tuesday the 1st of September, the wind finally drops back to 16 mph, and the swell is 5 ft from the east with a 9-second period. The energy is still high at 665 (moderate energy). But it’s still a cross-shore wind, so it’s only marginal.

The real standout, if you can call it that, is Wednesday the 2nd of September. We get a long-period groundswell from the south at 19 seconds, 4 ft, combined with a lighter 9 – 12 mph NE wind. The energy is off the charts at 1601 (very strong wave energy). That long period at a beach and reef set-up like Sandy Beach might make it a bit too straight, but it’s the cleanest the surf will be all window. It’s still only a marginal call, but it’s the best on offer.

So, honestly, for the first 13 days, it’s a write-off for decent paddle surfing. The wind is just relentless. The very end of the window on the 2nd of September is your best bet, but don’t get your hopes too high. It’s a long wait for a maybe.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Tue night). Winds decreasing (fresh winds from the ENE on Tue afternoon, light winds from the E by Fri morning).

Days 5-7 Weather Summary

Mostly dry. Warm (max 26°C on Fri afternoon, min 25°C on Sat night). Winds increasing (light winds from the E on Fri afternoon, strong winds from the ENE by Sun morning).

Tue
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
E
8
1.2
ENE
8
0.9
E
8
0.8
E
8
0.8
E
8
0.6
SSW
18
0.6
SSW
17
0.9
NE
7
0.9
NE
7
0.9
ENE
7
0.8
SSW
16
0.8
NE
7
1.6
ENE
6
1.8
ENE
7
2
E
7
1.9
ENE
7
2
ENE
7
2.2
E
7
2.1
ENE
7
2.4
ENE
8
Wave Graph
Metric surfscale
Energy kJ
119
155
109
100
80
207
200
84
79
83
322
66
207
308
377
332
350
467
444
661
Wind (km/h)
25
NE
25
ENE
25
ENE
25
NE
20
NE
20
NE
20
NE
10
ENE
10
E
20
ENE
15
E
35
ENE
35
ENE
35
ENE
40
ENE
40
NE
35
NE
40
ENE
40
ENE
35
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
High Tide
6:10PM0.31m
9:08AM0.53m
10:20AM0.55m
8:45PM0.20m
11:21AM0.57m
10:59PM0.20m
12:10PM0.60m
00:02AM0.21m
12:51PM0.62m
00:45AM0.24m
1:26PM0.65m
1:20AM0.27m
Low Tide
2:59PM0.27m
1:14AM0.09m
2:00AM0.10m
7:38PM0.20m
3:06AM0.11m
7:49PM0.17m
4:20AM0.10m
8:09PM0.14m
5:23AM0.08m
8:29PM0.12m
6:13AM0.06m
8:49PM0.11m
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:58
6:57
6:57
6:55
6:54
6:53
6:52
 mm
Temp °C
25
25
25
25
25
25
26
26
26
26
26
26
26
25
25
25
25
25
25
25
Feels °C
22
23
25
25
25
26
27
28
29
29
28
26
24
23
23
22
23
23
22
23
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  • 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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