Sponge bay Surf Break

Lat Long: 38.70° S 178.06° E

Sponge bay Surf Forecast and Surf Report

Issued: 11 pm 01 Sep 2026 (local time)

Forecast update in  hr  min

Today's Sponge bay sea temperature is
13.0°C
0.9° 

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 1 Sep 2026:

  • Best quality surf: Tuesday 8 Sep, 6AM (local time) - 15ft (4.5m), 13s period, SSW swell with cross-shore winds.
  • Most powerful swell: Tuesday 8 Sep, 6AM (local time) - 15ft (4.5m), 13s period, SSW swell with 6,893 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 2 Sep, 12PM (local time) - 6ft (1.8m), 17s period with SSE 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 02) at 12PM. The primary swell is predicted to be 1.8m and 17s period with a secondary swell of 1.1m and 18s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Sponge bay in the next 16 days are 4.5m 13s and forecast to arrive on Tuesday (Sep 08) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Sunday (Sep 06) at 12AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Wed 2nd Sep)6ft (1.8m) 17s
Best Surf 6AM (Tue 8th Sep)15ft (4.5m) 13s
Most Powerful 6AM (Tue 8th Sep)15ft (4.5m) 13s

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


The Lowdown

G'day, Rusty here, and I've had a good look at what's on the table for Sponge Bay over the next couple of weeks. It's a bit of a mixed bag, with a few standout windows that are worth getting excited about, but there are some long, quiet spells you'll need to surf around.

The main event is the first two days. Wednesday the 2nd kicks off with a solid 6 ft SSE groundswell, with a period of 14 seconds and a combined energy of 1463. That's a decent amount of juice in the water. The morning is clean enough with a 12 mph NW cross-off, but it's the afternoon that's the real treat. The wind drops to a glassy 3 mph NW, and the swell bumps up to 6 ft from the SSE with a very long 17-second period and a combined energy of 1938. That's powerful, clean, and for experienced surfers only. The water temperature is about average for this time of year, so no surprises there. The swell direction is right on the money for Sponge Bay's optimum SSE, and while it can get crowded, the conditions will be so good it's worth it. Just be aware that a long period like this can make beach breaks a bit straight, but for a beach and reef setup, it should still line up nicely.

Thursday the 3rd is still decent, but not the same level. The morning has a 4 ft SSE swell with a 13-second period, 506 combined energy, and a 9 mph NW cross-off. It's clean and surfable, with good conditions expected. The afternoon gets even better with a 3 ft SSE swell, same 13-second period, a 318 combined energy, and a 3 mph NNE offshore wind. That's glassy and clean, perfect for a longer board.

Then we hit a wall. From Friday the 4th all the way through to Sunday the 13th, there's a long, dry gap. The swell drops to tiny 0.7 ft to 2 ft with weak energy, and the wind is mostly cross-off or onshore. It's a proper lull of over a week, so don't bother checking the cam. The local area tends to have these blank runs, so it's not a huge surprise.

The next sign of life is on Tuesday the 8th, but it's a messy one. The morning sees a 8 ft SSE swell from a 12-second period and a combined energy of 1579. That's a big wall of water, but the wind is a 6 mph WSW cross-onshore, and the conditions are described as marginal. The afternoon is worse with a 12 mph SSE cross-onshore making it choppy. For the size and the wind, this setup looks more interesting for kite surfing than paddle surfing.

The following week is a struggle. Thursday the 10th morning has a 5 ft SSE swell with a 10-second period and 647 combined energy, and a 6 mph NNW offshore wind. That's clean, but the swell period is a bit short, so it'll be a bit weak and crumbly. The forecast is ordinary, so it's a "maybe" if you're desperate.

The only other flicker of hope is Thursday the 17th, which is over two weeks away. The morning has a 3 ft SSE swell, 8-second period, and 144 combined energy, but the wind is a glassy 3 mph SW. It's small and weak, but it'll be glassy. Keep an eye on it, but don't plan your week around it.

So, the standout is Wednesday afternoon the 2nd. That's the one you want to clear your schedule for. Thursday the 3rd is a solid backup. The rest of the window is mostly a write-off, with a few marginal days for the keen.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Thu afternoon, min 7°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 5mm), mostly falling on Mon afternoon. Very mild (max 16°C on Fri night, min 9°C on Fri night). Mainly fresh winds.

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
4
3
2
2
0
0
0
0
0
0
0
0
0
1
0
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)
2.3
SSE
14
1.7
SSE
14
1.8
SSE
17
1.5
SSE
15
1.2
SSE
13
1
SSE
13
0.7
SSE
12
0.5
SSE
11
0.4
SSE
10
0.3
SSE
10
0.2
SSE
9
0.3
SSE
9
0.4
SSE
8
0.3
SSE
9
0.2
S
18
0.3
SSE
17
0.2
S
16
0.2
S
16
4
SSW
12
Wave Graph
Metric surfscale
Energy kJ
2035
1023
1938
970
499
312
123
68
42
18
8
15
22
16
25
57
21
20
4987
Wind (km/h)
15
NW
20
NW
5
NW
15
WNW
15
NW
5
NNE
20
NW
20
NNW
25
NW
15
WNW
10
NW
15
ENE
15
NW
20
NW
15
N
25
N
10
NNW
10
W
35
SW
Wind State
cross-off
cross-off
glassy
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
cross
cross-on
High Tide
9:04PM2.02m
9:29AM2.00m
9:48PM1.98m
10:14AM1.99m
10:35PM1.94m
11:03AM1.96m
11:23PM1.89m
11:55AM1.92m
00:14AM1.84m
12:49PM1.88m
1:09AM1.78m
1:45PM1.84m
2:13AM1.74m
Low Tide
3:22AM0.44m
3:36PM0.48m
4:05AM0.44m
4:22PM0.50m
4:53AM0.45m
5:11PM0.54m
5:44AM0.47m
6:05PM0.58m
6:37AM0.51m
7:03PM0.63m
7:32AM0.54m
8:06PM0.66m
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
clear
clear
clear
part cloud
part cloud
cloud
rain showers
cloud
light rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:26
6:26
6:24
6:22
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:45
5:46
5:47
5:47
5:49
5:50
 mm
2
3
1
Temp °C
9
17
18
14
17
19
15
17
16
16
14
14
11
15
16
16
15
13
11
Feels °C
7
14
16
10
14
16
11
13
11
12
10
10
8
10
12
13
13
11
6
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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 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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