Sponge bay Surf Break

Lat Long: 38.70° S 178.06° E

Sponge bay Surf Forecast and Surf Report

Issued: 11 am 07 Sep 2026 (local time)

Forecast update in  hr  min

Today's Sponge bay sea temperature is
13.2°C
0.8° 

Sponge bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Sponge bay surf forecast from 7 Sep 2026:

  • Best quality surf: Sunday 13 Sep, 12AM (local time) - 6ft (1.8m), 16s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 3AM (local time) - 11ft (3.5m), 9s period, S swell with 2,128 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 9 Sep, 6AM (local time) - 4.5ft (1.3m), 8s period with SE swell.

Best Forecast Surf Conditions for Sponge bay this week:

The surf forecast for Sponge bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 09) at 6AM. The primary swell is predicted to be 1.3m and 8s period with a secondary swell of 0.1m and 15s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Sponge bay in the next 16 days are 3.5m 9s and forecast to arrive on Tuesday (Sep 08) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 8s period and expected on Sunday (Sep 13) at 12AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Wed 9th Sep)4.5ft (1.3m) 8s
Best Surf12AM (Sun 13th Sep)6ft (1.8m) 16s
Most Powerful 3AM (Tue 8th Sep)11ft (3.5m) 9s

Table - best surf conditions forecast for Sponge bay over the next 16 days.


The Lowdown

Alright folks, it’s Rusty here, and I’ve gotta be straight with ya – the next couple of weeks at Sponge Bay are looking like a real mixed bag of a waiting game. We’ve got some decent energy coming through at times, but the wind is going to be the main character, and not always a friendly one. Let’s break it down.

Right now, the water temp is sitting at 56°, which is just about what you’d expect for this time of year. Nothing weird going on there.

The first real flicker of hope doesn’t show up until Wednesday afternoon, the 9th of September. We’ve got a tiny little 4 ft swell from the SE, with a short period of 8 seconds, and the energy is weak (176). The wind will be a light cross-offshore from the NW though, so the surface will be clean. It’s surfable, but truly ordinary – you’ll be on a foamy or a longboard, just getting wet.

Thursday the 10th is a write-off – too small. Friday the 11th is a total mess with strong onshore winds and a jumbled up 7 ft swell. Forget it.

Now, let’s talk about the real standout. Monday the 14th of September is where it’s at. The morning is looking *glassy* – winds from the NW dropping to nothing, just a slight air. We’ve got a 4 ft SSE groundswell with a long 13-second period, and the energy is moderate (406). The afternoon holds up too, with a clean cross-offshore breeze. This is the best on offer by a long shot. The swell direction from the SSE is bang on what this spot likes, and with those conditions, Sponge Bay will be clean and fun. Keep in mind the period is long, so expect some lulls between sets, but the waves that come through will have real shape.

Tuesday the 15th is also a good call, with a clean offshore wind in the morning and a similar 3 ft swell from the SSE with a long 12 to 14-second period. The energy is still decent (274 to 314). It’s a solid follow-up day.

After that, things get ugly again. We get a big spike of energy on Sunday the 13th (1876) but it’s cross-onshore and choppy, so it’s a no-go. Then a big, messy system rolls in on Friday the 18th of September with a 7 ft SW swell (1517 energy) but strong cross-onshore winds making it a total washing machine. That kind of energy and wind setup at a beach and reef break like this honestly looks more interesting for kite surfing than paddling in.

The second week is a bust. From the 16th onward, it’s mostly onshore slop, chop, and lumpy conditions. There’s a stormy pulse on the 21st and 22nd, but it’s all bad wind.

So, to wrap it up: don’t bother paddling out until Monday the 14th. That’s your window. Glassy, clean, and a proper long-period groundswell. Tuesday the 15th is a good backup. The rest of the time, you’re better off waxing your board at home and waiting for a change in the forecast.

Rusty.

Short Range Forecast

Moderate rain (total 18mm), heaviest on Mon night. Very mild (max 16°C on Mon morning, min 8°C on Mon night). Winds decreasing (strong winds from the SW on Mon night, calm by Wed morning).

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Fri morning. Very mild (max 16°C on Thu afternoon, min 7°C on Fri night). Mainly fresh winds.

Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
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
1
1
0
0
0
1
0
0
1
0
0
4
4
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.2
SSE
16
0.2
S
16
3.5
S
9
3.5
S
9
3
S
9
1.6
SE
8
1.3
SE
8
1.1
SE
8
0.9
ESE
8
0.8
ESE
7
0.7
SE
7
0.3
SSE
15
0.3
SSE
19
1.4
S
7
0.4
SSE
18
0.8
SSW
7
0.5
SSE
17
1.8
SSE
16
1.8
SSE
16
1.6
SSE
16
1.3
SSE
16
Wave Graph
Metric surfscale
Energy kJ
26
20
1860
1802
1256
311
191
147
98
68
56
45
74
181
102
56
159
1631
1675
1278
796
Wind (km/h)
20
NNW
20
W
50
SW
40
SW
35
SW
15
SW
5
WNW
10
ENE
15
NW
20
NW
20
WNW
15
NW
35
S
20
SSW
10
NW
25
SSW
10
SSE
15
NW
10
WNW
15
SSW
5
WSW
Wind State
cross-off
cross
cross-on
cross-on
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
on
on
cross-off
cross-on
on
cross-off
cross-off
on
cross
High Tide
1:45PM1.84m
2:13AM1.74m
2:51PM1.83m
3:33AM1.75m
4:11PM1.86m
4:48AM1.81m
5:18PM1.94m
5:44AM1.88m
6:09PM2.01m
6:33AM1.95m
6:53PM2.05m
7:17AM1.99m
7:34PM2.05m
Low Tide
8:06PM0.66m
8:34AM0.56m
9:17PM0.66m
9:47AM0.55m
10:31PM0.62m
10:55AM0.51m
11:34PM0.55m
11:50AM0.46m
00:26AM0.48m
12:37PM0.42m
1:10AM0.44m
1:23PM0.42m
1:52AM0.42m
light rain
light rain
heavy rain
light rain
part cloud
part cloud
cloud
part cloud
clear
part cloud
cloud
light rain
light rain
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:20
6:18
6:16
6:15
6:13
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:50
5:51
5:52
5:52
5:53
5:54
5:54
 mm
1
2
13
2
1
4
Temp °C
16
12
12
10
11
10
11
11
9
15
16
12
10
11
8
11
12
9
16
15
13
Feels °C
12
8
7
2
3
6
10
8
6
11
12
9
2
6
4
6
9
5
13
11
10
  • 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 Sponge bay Surf forecast

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

Are you planning a holiday in Gisborne and Mahia? If you are looking for accommodation near Sponge bay, camping, hotels and holiday cottages in Gisborne and Mahia, consider staying in Gisborne which is 8 km (5 miles) away.

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