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 pm 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nanwan Beach (South Bay) sea temperature is
28.8°C
0.0° 

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 30 Aug 2026:

  • Best quality surf: Wednesday 2 Sep, 8PM (local time) - 16ft (5.0m), 12s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 2 Sep, 8PM (local time) - 16ft (5.0m), 12s period, SSW swell with 7,301 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 2 Sep, 8PM (local time) - 16ft (5.0m), 12s period with SSW 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 Wednesday (Sep 02) at 8PM. The primary swell is predicted to be 5.0m and 12s period with a secondary swell of 4.5m and 12s. 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 5.0m 12s and forecast to arrive on Wednesday (Sep 02) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Thursday (Sep 03) at 5AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Wed 2nd Sep)16ft (5.0m) 12s
Best Surf 8PM (Wed 2nd Sep)16ft (5.0m) 12s
Most Powerful 8PM (Wed 2nd Sep)16ft (5.0m) 12s

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


The Lowdown

Alright folks, Rusty here. Let’s get into it for Nanwan Beach (South Bay). The water temp is sitting at a warm 84°, which is pretty much spot on for this time of year – no surprises there.

Right now, the outlook is a bit of a tough one. The first week is pretty much a write-off. We’ve got a serious run of poor surf conditions through to the end of August and into the first few days of September. The swell is there, but it’s a mess. From Sunday 30th, we’re looking at a 8ft SSW swell with a short period, but it’s hammered by a strong onshore wind. The combined wave energy is 900 (moderate), but the wind is just ruining it. By Monday 31st, it gets worse – a 12ft SW swell with 28 mph winds, and the energy jumps to 2164 (strong). This is all blown-out, cross-onshore junk. Not one for the paddle board. Honestly, if you’re into kite surfing, the setup from the 1st to the 3rd of September with those 15ft to 16ft swells and strong cross-shore winds might be more your speed than paddle surfing.

The first real glimmer of hope comes on Thursday 3rd September. The wind finally swings offshore from the west, and the swell drops to a manageable 7ft from the SW. The combined energy is 1010 (moderate), and the conditions are clean. This is a marginal call, but it’s the best we’ve seen. The swell direction is from the SW, which is fine, but the optimum here is SE, so it’s not quite lining up perfectly. Still, a clean 7ft wave at a beach and reef break is worth a look for the intermediate crew. Just be aware, crowds are often a thing here, so don’t expect to have it to yourself. The morning of the 3rd is the pick of the first week.

After that, it drops off again. The 4th and 5th see small, weak swells under 4ft, and even though the wind is light or glassy, the energy is low (down to 124). The 5th of September has a glassy morning with a 3ft SW swell, but it’s very ordinary. We then hit a real dead patch. From the 6th of September through to the 13th, the swell is tiny, mostly under 2ft, and the energy is weak (under 100). The wind is often clean, but there’s just no power.

The second week holds a late bloomer. The 13th and 14th of September start to look promising again. On Sunday 13th, the wind is a clean cross-off from the NE, and the swell builds to 4ft from the SSW with a period of 10 seconds. The energy jumps to 296 (moderate). The next day, Monday 14th, is the real standout in the whole 16-day window. We’re looking at a 6ft SSW groundswell with a period of 11 seconds, clean cross-off winds from the NE, and a combined energy of 736 (strong). The swell direction is SSW, which is still off the optimum SE, but with that clean wind and solid energy, Nanwan Beach should be offering some proper, well-shaped waves. This is a long-range call, so keep an eye on it, but it’s the best bet on the board.

The standout here is Monday 14th September. The swell is 6ft from the SSW, the wind is offshore and clean, and the energy is strong. It’s a bit of a wait, but it’s the one to circle on the calendar.

Rusty.

Short Range Forecast

Heavy rain (total 462mm), heaviest during Sun night. Warm (max 28°C on Tue night, min 26°C on Sun night). Winds increasing (light winds from the ESE on Sun night, gales from the SW by Mon night).

Days 5-7 Weather Summary

Heavy rain (total 21mm), heaviest during Wed afternoon. Warm (max 29°C on Sat morning, min 27°C on Wed night). Winds decreasing (strong winds from the SSW on Wed afternoon, calm by Sat morning).

Sun
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
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
!
2
2
2
1
0
1
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
SSW
9
2.3
SW
9
3.5
SW
9
3.5
SW
10
4
SW
10
4.5
SW
10
4.5
SW
10
4
SW
10
4.5
SW
11
5
SSW
12
3.5
SSW
11
2.2
SW
10
2
SW
9
1.5
SW
9
1.3
SW
8
1.2
SW
8
1
SW
8
0.9
SSW
8
0.9
SW
8
0.7
SW
8
Wave Graph
Metric surfscale
Energy kJ
893
861
2160
2561
2974
3616
4670
3046
5201
6109
2438
967
679
367
256
191
116
106
107
59
Wind (km/h)
25
SSE
20
SE
45
SSW
55
SSW
55
SW
55
SW
50
SW
45
SSW
50
SSW
30
SSW
25
W
20
W
25
W
10
W
20
WNW
20
NW
10
WNW
5
W
5
N
20
NE
Wind State
on
on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
glassy
cross-off
High Tide
8:14PM0.84m
8:25AM0.98m
8:42PM0.91m
9:04AM0.86m
9:15PM0.97m
9:49AM0.72m
9:55PM1.02m
10:47AM0.58m
10:45PM1.05m
12:37PM0.46m
11:53PM1.06m
1:23AM1.08m
Low Tide
2:19PM0.22m
2:05AM0.24m
2:38PM0.27m
2:55AM0.24m
2:56PM0.32m
3:54AM0.26m
3:13PM0.37m
5:07AM0.28m
3:26PM0.41m
6:49AM0.28m
3:21PM0.44m
8:56AM0.23m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:39
5:39
5:39
5:39
5:39
5:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:14
6:13
6:12
6:12
6:10
6:09
 mm
11
98
77
67
106
40
33
22
8
9
6
1
5
2
1
Temp °C
27
26
26
27
27
27
27
28
28
28
28
28
28
28
28
28
28
29
29
28
Feels °C
30
23
23
24
23
22
23
27
27
27
28
31
29
30
31
29
31
34
34
32
  • 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 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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