Sandy Beach Surf Break

Lat Long: 21.29° N 157.67° W

Sandy Beach Surf Forecast and Surf Report

Issued: 7 am 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Sandy Beach sea temperature is
26.5° 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 22 Jul 2026:

  • Most powerful swell: Monday 27 Jul, 2PM (local time) - 6ft (1.8m), 14s period, E swell with 1,321 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 1.8m 14s and forecast to arrive on Monday (Jul 27) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Mon 27th Jul)6ft (1.8m) 14s

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


The Lowdown

Alright folks, Rusty here. The 16-day window for Sandy Beach on the Big Island is a bit of a mixed bag. We've got some real challenges with the wind, and a whole lot of nothing for the first week. The water’s sitting at a pretty typical 80°, nothing unusual there for this time of year.

Sandy Beach (Big Island) kicks off the forecast, but honestly, don't bother paddling out until the very end of the run. The first week is a total write-off. From Tuesday the 21st right through to Thursday the 30th of July, it’s a grim stretch. We’re looking at a relentless ENE wind blowing at 16 to 25 mph every single day. That’s a stiff cross-shore breeze churning up a lumpy cross-chop. The swell that's around is mostly tiny, or it’s a long-period SSW groundswell that just isn't lining up right for this exposed beach setup. The combined wave energy is moderate at best, bouncing between 424 and 1053 units, but it’s all slop. The conditions are just plain poor.

Things start to look a little less hopeless around Sunday the 26th of July. The swell picks up a bit, hitting 4 ft to 5 ft from the east with a long 15 to 16 second period. The energy jumps into the strong range (1462 to 1658 units). That's a proper groundswell, but the wind is still a fresh cross-shore from the NE at 19 mph, keeping the sea lumpy. It’s only rated as marginal, and not something I’d get too excited about unless you're desperate for a paddle.

The same story continues through the last few days of July and into the start of August. Cleaner conditions show up on the morning of Tuesday the 28th, with a lighter NNE wind making for a cross-off breeze. The swell holds at 6 ft from the east with a 13-second period. That might be the closest we get to a clean session, but the consistency isn’t there for a standout.

The only real standout window, and it's a proper pinch-me moment, is on the afternoon of Saturday the 1st of August. The swell absolutely pumps up to 10 ft from the ENE. Now, that’s a big number. The combined energy is a burly 1179 units. But here’s the kicker: the guidance says it's predicted to be too big for this break. That kind of size on an exposed beach and reef setup like Sandy’s with a short 8-second period is going to be a washing machine. The wind is a fresh cross-shore at 22 mph, so it'll be lumpy on top of that. This is strictly for experienced chargers who know the sand bars, and even then, it’s a dice roll. Beginners, don't even think about it.

So, the long and short of it is: Sandy Beach is going to be a frustrating spot for the next two weeks. There are no clean, easy days on offer. The very end of the run has some solid size, but with the conditions, it’s more of a challenge than a cruise. Fingers crossed the forecasts shift, because this is a long stretch of so-so surf.

Rusty out.

Short Range Forecast

Light rain (total 2mm), mostly falling on Tue morning. Warm (max 25°C on Tue morning, min 24°C on Wed afternoon). Mainly strong winds.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Sat night. Warm (max 25°C on Fri morning, min 24°C on Fri morning). Mainly strong winds.

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
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
1
1
1
1
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)
0.9
S
14
0.9
S
14
0.9
S
13
0.5
SSW
24
0.6
SSW
23
0.6
SSW
22
2.1
ENE
7
2
E
7
0.9
SSW
18
0.7
SSW
18
0.8
SSW
17
2.1
ENE
7
2
ENE
8
0.9
SSW
18
2.1
ENE
8
1.1
E
15
1.4
E
16
1.6
E
16
1.6
E
14
1.8
E
14
1.8
E
14
Wave Graph
Metric surfscale
Energy kJ
329
311
277
317
426
363
412
395
503
329
349
482
471
572
547
563
959
1206
1055
1321
1297
Wind (km/h)
25
ENE
25
NE
20
ENE
35
ENE
35
ENE
30
ENE
40
ENE
40
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
30
NE
30
NE
30
ENE
25
ENE
30
NE
25
ENE
Wind State
cross
cross
cross-on
cross-on
cross
cross-on
cross
cross
cross-on
cross
cross
cross-on
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
High Tide
10:08AM0.51m
7:46PM0.29m
11:08AM0.55m
8:50PM0.23m
11:59AM0.59m
10:38PM0.19m
12:42PM0.62m
11:56PM0.19m
1:20PM0.64m
00:50AM0.19m
1:55PM0.66m
1:32AM0.20m
2:28PM0.68m
2:09AM0.22m
Low Tide
5:25PM0.28m
3:12AM0.05m
7:38PM0.23m
3:57AM0.05m
8:24PM0.18m
8:50PM0.15m
5:38AM0.03m
9:14PM0.12m
6:24AM0.02m
9:38PM0.11m
7:06AM0.01m
10:01PM0.09m
rain showers
rain showers
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
rain showers
part cloud
clear
rain showers
rain showers
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
6:00
6:00
6:00
6:01
6:01
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:14
7:13
7:13
7:13
7:12
7:12
7:12
 mm
1
1
1
1
1
Temp °C
25
25
25
25
25
24
25
25
24
25
25
24
25
25
25
24
24
25
24
25
25
Feels °C
25
24
24
23
22
21
21
21
20
22
22
20
22
22
22
21
21
22
22
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)
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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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