Nanwan Beach (South Bay) Surf Break

Lat Long: 21.96° N 120.76° E

Nanwan Beach (South Bay) Surf Forecast and Surf Report

Issued: 1 am 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nanwan Beach (South Bay) sea temperature is
28.9° C
0.1° 

Nanwan Beach (South Bay) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Nanwan Beach (South Bay) surf forecast from 14 Aug 2026:

  • Best quality surf: Monday 17 Aug, 5AM (local time) - 6.5ft (2.0m), 9s period, SW swell with cross-offshore winds.
  • Most powerful swell: Saturday 15 Aug, 11PM (local time) - 7.5ft (2.3m), 8s period, SW swell with 737 kJ wave energy.
  • Next surfable swell (1★+): Monday 17 Aug, 5AM (local time) - 6.5ft (2.0m), 9s period with SW swell.

Best Forecast Surf Conditions for Nanwan Beach (South Bay) this week:

The surf forecast for Nanwan Beach (South Bay) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 5AM. The primary swell is predicted to be 2.0m and 9s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Nanwan Beach (South Bay) in the next 16 days are 2.3m 8s and forecast to arrive on Saturday (Aug 15) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 7s period and expected on Tuesday (Aug 18) at 11PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Mon 17th Aug)6.5ft (2.0m) 9s
Best Surf 5AM (Mon 17th Aug)6.5ft (2.0m) 9s
Most Powerful11PM (Sat 15th Aug)7.5ft (2.3m) 8s

Table - best surf conditions forecast for Nanwan Beach (South Bay) over the next 16 days.


The Lowdown

Alright, let’s get into it. Right now, the surf around Nanwan Beach (South Bay) is a bit of a head-scratcher. We’ve got a fair bit of energy in the water, but the conditions are really holding things back. The water temp is sitting at a pretty standard 84°F, so nothing unusual there for this time of year.

The first real chance of anything decent doesn’t come until Saturday morning, the 15th of August. We’re looking at a 6ft swell from the SSW, with a short 8-second period, and combined energy of 496 – that’s moderate. The wind is blowing from the west at 12 mph, giving us a cross-off breeze, which is actually a good thing for keeping the surface clean. But it’s a risk of thunderstorms, so keep an eye on the sky. It’s not perfect, but it’s the best we’ve got early on.

Things go pretty flat and messy for a long stretch after that. From Sunday the 16th all the way through to Thursday the 20th, it’s a mix of poor surf conditions, cross-shore winds, and onshore slop. Nothing worth paddling out for. The 21st of August brings a glimmer of hope Friday morning – a 7ft SW swell, 9-second period, and a cross-off wind from the WNW at 19 mph. The combined energy jumps to 715, which is decent, but the forecast still calls it marginal. It’s clean, but the tide might be playing tricks.

The standout in this whole 16-day window is shaping up to be Saturday the 22nd of August. Both morning and afternoon sessions are showing a 6ft swell from the SSW, now with a 10-second period – that’s a bit more groundswell character. The energy is up around 723-748, and the wind is cross-off from the WNW and then west, blowing at 12-16 mph. It’s clean, the waves should have a bit more shape, and this is the pick of the bunch. The crowds are often around here, so don’t expect to have it to yourself.

After that, we’re back into a messy pattern. The 23rd has some light onshore winds, and from the 24th to the 26th it’s mostly cross-shore chop and poor conditions. Then things get wild – on the 27th of August, we’ve got a massive 18ft SSW swell with a long 11-second period, and the energy is off the charts at 6700. But the wind is cross-on and choppy, so this is purely for the experts. At that size and with those winds, it’s more of a spectacle than a session. It’s also worth noting that with a long period like that, the swell might be breaking a bit too straight for a beach break setup.

The 28th of August drops down to an 12ft SSW swell, still big, but the wind is lighter and more cross-shore, so it might clean up a little by afternoon. Still, not for the faint-hearted. The last few days of the month see the energy drop back down, but the wind stays messy.

So, if you’re looking for the best window, pencil in Saturday the 22nd of August. That’s your cleanest, most rideable swell with the best wind. The rest of the time, it’s a waiting game.

Rusty.

Short Range Forecast

Heavy rain (total 38mm), heaviest during Sat night. Warm (max 30°C on Mon morning, min 27°C on Sat night). Winds decreasing (fresh winds from the W on Sat afternoon, calm by Mon morning).

Days 4-6 Weather Summary

Heavy rain (total 42mm), heaviest during Thu afternoon. Warm (max 30°C on Tue morning, min 25°C on Thu night). Mainly strong winds.

Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
2
0
0
1
0
1
1
0
0
0
0
0
0
0
0
0
1
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
SSW
8
2.2
SW
8
2.1
SW
9
1.9
SW
8
2
SSW
8
2
SW
9
1.9
SW
9
1.9
SW
9
1.5
SW
8
1.3
SW
9
1.2
SW
9
1
SW
9
0.9
SW
9
1
SW
9
1.1
SW
9
1.2
SSW
9
1.4
SSW
11
1.5
SSW
10
2
SW
9
1.7
SW
9
1.8
SSW
10
Wave Graph
Metric surfscale
Energy kJ
481
619
664
479
567
594
514
502
311
243
216
155
132
166
194
236
425
411
664
502
615
Wind (km/h)
20
W
35
W
20
W
20
WSW
15
WSW
10
WSW
10
ESE
20
ENE
20
NNE
30
NE
35
NE
30
NE
35
NE
30
NE
20
ENE
25
E
35
ESE
35
WSW
30
WNW
30
W
15
W
Wind State
cross-off
cross-off
cross-off
cross
cross
cross
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-on
cross
cross-off
cross-off
cross-off
High Tide
8:15AM1.17m
8:55PM0.76m
8:55AM1.03m
9:26PM0.83m
9:33AM0.87m
9:58PM0.88m
10:10AM0.71m
10:34PM0.92m
10:51AM0.58m
11:17PM0.93m
12:03PM0.47m
00:13AM0.94m
1:28AM0.95m
Low Tide
3:05PM0.18m
2:26AM0.28m
3:25PM0.26m
3:20AM0.31m
3:40PM0.33m
4:21AM0.35m
3:48PM0.38m
5:35AM0.39m
3:49PM0.42m
7:25AM0.40m
3:28PM0.44m
9:52AM0.36m
mod rain
mod rain
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
clear
part cloud
clear
thunderstorm
clear
clear
rain showers
rain showers
heavy rain
thunderstorm
rain showers
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:33
5:33
5:35
5:35
5:35
5:35
5:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:28
6:27
6:25
6:24
6:24
6:23
6:22
 mm
7
7
10
3
1
8
2
2
5
3
14
18
1
Temp °C
29
28
28
28
29
28
30
30
29
30
30
29
29
30
28
29
27
28
27
28
28
Feels °C
31
29
30
31
31
33
34
33
32
29
29
27
27
29
28
30
27
28
26
28
29
  • Map Icons:
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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 Nanwan Beach (South Bay) Surf forecast

The above surf forecast table for Nanwan Beach (South Bay) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nanwan Beach (South Bay) can be found by selecting the local surf guide option on the grey menu. Our Nanwan Beach (South Bay) 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 (Nanwan Beach (South Bay)) 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 Nanwan Beach (South Bay) 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.

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