Sandy Beach Surf Break

Lat Long: 21.29° N 157.67° W

Sandy Beach Surf Forecast and Surf Report

Issued: 1 pm 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Sandy Beach sea temperature is
26.9° 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 10 Aug 2026:

  • Best quality surf: Saturday 15 Aug, 2PM (local time) - 10ft (3.0m), 13s period, ENE swell with cross-shore winds.
  • Most powerful swell: Sunday 16 Aug, 2PM (local time) - 15ft (4.5m), 13s period, ENE swell with 6,839 kJ wave energy.
  • Next surfable swell (1★+): Saturday 15 Aug, 2PM (local time) - 10ft (3.0m), 13s period with ENE 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 Saturday (Aug 15) at 2PM. The primary swell is predicted to be 3.0m and 13s period with a secondary swell of 0.9m and 13s. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Sandy Beach in the next 16 days are 4.5m 13s and forecast to arrive on Sunday (Aug 16) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 10s period and expected on Sunday (Aug 16) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Sat 15th Aug)10ft (3.0m) 13s
Best Surf 2PM (Sat 15th Aug)10ft (3.0m) 13s
Most Powerful 2PM (Sun 16th Aug)15ft (4.5m) 13s

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


The Lowdown

Alright, let’s take a look at what we’ve got on the cards for Sandy Beach over this 16-day stretch.

Honestly, it’s a pretty grim run for most of it. We’re looking at a long stretch of poor conditions with only one real standout day that’s worth getting excited about – and that one’s for experts only.

The water temp is sitting at about 80°, which is pretty much average for this time of year, nothing unusual there.

The pattern starts off with a string of weak, short-period, cross-shore junk. From Sunday the 9th right through to Saturday the 15th, it’s all poor surf with fresh breezes from the ENE to NE, creating lumpy, cross-chop conditions. Swell heights bounce between 3 ft and 6 ft, but the periods are short (mostly 6-8 seconds), and the energy is moderate (566 to 871), but it’s just messy. The wave comments say “poor surf conditions” every time – no recommendation there. So that’s a solid week of nothing worth paddling out for.

Then we hit Sunday the 16th of August – that’s the one day that stands out. The morning and afternoon both show a big groundswell from the ENE, 15 ft with a period of 12-13 seconds. The energy is huge (6695 to 6838). Wind is from the N to NNW at 16 mph, which gives us a cross-offshore situation, and the wave comment says “clean.” The score is high, and it says wind and tide are favorable. But, and this is a big but – that swell is predicted to be too big for this break. Sandy Beach is a beach and reef setup, and with 15 ft and a long period, it’s going to be a heavy, dangerous wave. Only experienced surfers should even consider it, and even then, be careful. This is not for beginners. The long period (12-13 sec) means long sets and a lot of water moving around.

After that, the rest of the outlook from Monday the 17th through Monday the 24th goes back to poor conditions. Swells drop back down to 4 ft to 7 ft, with short periods again (6-8 seconds) and moderate energy (142 to 914). Winds are cross to cross-onshore from the ENE and NE, with fresh to strong breezes creating lumpy, choppy waves. No recommendations here at all. By the end of the run, there’s nothing worth writing home about.

So to sum it up: The first week is a washout. The standout is Sunday the 16th – huge, clean, heavy swell – but it’s for experts only, and the size is a real concern. After that, it’s back to the same old story. Not a great run for Sandy Beach, but it happens.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Sun afternoon). Mainly fresh winds.

Days 5-7 Weather Summary

Mostly dry. Warm (max 26°C on Thu morning, min 25°C on Wed afternoon). Mainly fresh winds.

Sun
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
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
1
0
0
0
0
0
1
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)
1.6
ENE
8
1.6
ENE
7
1.3
ENE
8
1.4
ENE
8
1.3
ENE
7
1.3
ENE
7
0.8
SSW
14
0.6
S
20
0.9
S
18
0.9
S
18
1.3
S
16
1
S
16
1.2
S
15
1.1
S
15
1
S
14
1.8
ENE
8
2.3
ENE
10
3
ENE
12
3.5
ENE
13
4
ENE
13
Wave Graph
Metric surfscale
Energy kJ
276
259
196
215
186
181
269
276
509
498
890
501
653
537
411
424
999
2053
3501
4937
Wind (km/h)
30
ENE
30
ENE
30
NE
30
NE
25
ENE
25
ENE
35
ENE
25
ENE
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
30
NE
35
NE
35
NE
20
NNE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
High Tide
1:01AM0.23m
1:55PM0.79m
1:52AM0.27m
2:36PM0.79m
2:40AM0.31m
3:14PM0.76m
3:27AM0.36m
3:49PM0.71m
4:15AM0.41m
4:22PM0.64m
5:04AM0.45m
4:53PM0.55m
Low Tide
8:50PM0.08m
6:37AM-0.03m
9:21PM0.06m
7:31AM-0.04m
9:52PM0.05m
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
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:07
6:07
6:07
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:05
7:04
7:02
7:02
7:01
7:00
7:00
 mm
Temp °C
26
25
26
26
26
26
26
25
25
25
25
26
26
25
25
26
26
26
26
25
Feels °C
25
24
26
24
25
25
24
23
24
22
22
24
23
22
21
23
24
23
24
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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