Ruby Bay Surf Break

Lat Long: 41.21° S 173.09° E

Ruby Bay Surf Forecast and Surf Report

Issued: 5 pm 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ruby Bay sea temperature is
12.1°C
0.2° 

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


Ruby Bay surf forecast from 30 Aug 2026:

  • Best quality surf: Sunday 6 Sep, 3PM (local time) - 5ft (1.5m), 7s period, N swell with cross-offshore winds.
  • Most powerful swell: Sunday 6 Sep, 3PM (local time) - 5ft (1.5m), 7s period, N swell with 229 kJ wave energy.
  • Next surfable swell (1★+): Sunday 6 Sep, 3PM (local time) - 5ft (1.5m), 7s period with N swell.

Best Forecast Surf Conditions for Ruby Bay this week:

The surf forecast for Ruby Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 06) at 3PM. The primary swell is predicted to be 1.5m and 7s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Ruby Bay in the next 16 days are 1.5m 7s and forecast to arrive on Sunday (Sep 06) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 8s period and expected on Friday (Sep 04) at 6AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Sun 6th Sep)5ft (1.5m) 7s
Best Surf 3PM (Sun 6th Sep)5ft (1.5m) 7s
Most Powerful 3PM (Sun 6th Sep)5ft (1.5m) 7s

Table - best surf conditions forecast for Ruby Bay over the next 16 days.


The Lowdown

Alright, Rusty here. Let's have a look at Ruby Bay.

Honestly, it's a pretty flat and quiet stretch ahead for this sheltered point break. The water temp is sitting at about 54°, which is pretty much bang on average for the time of year, so nothing wild there. The problem is, for the next week and a half, there's just no real swell energy to get excited about. We see a couple of tiny bumps – maybe 0.3 ft from the north on Sunday the 30th – but the wave energy is basically non-existent (1), and it's barely a ripple. The week that follows is mostly zeros on the chart. There is a brief moment on Thursday the 3rd of September where things go glassy and we get a little 3 ft pulse from the north with 7-second period and 60 energy units, but the file itself calls it "poor surf conditions," and honestly, that's a polite way of saying it's still not doing much.

The only period that even looks like it might get your heart rate up is Sunday the 6th of September in the afternoon. Swell jumps up to 5 ft from the north, with 7-second period. That combined energy hits 229, which is moderate, and the wind is light cross-off out of the WNW. It’s big enough that beginners might want to sit it out, but it’s the most significant push we see in the whole 16 days. Even then, the word is "very ordinary conditions," so I’d keep your expectations low.

The real standout, if you can call it that, is that Sunday the 6th afternoon session. The 5 ft north swell with light cross-off breeze makes it the only window with actual size and half-decent wind. But Ruby Bay is a point break that's sheltered and rarely breaks, so it needs everything to line up. Even then, it's not going to be epic.

After that, it's back to a flat spell. Clean, glassy mornings on the 7th, 12th, and 13th, but with no swell to speak of. By the time we get to Monday the 14th of September, there’s a ghost of a north swell with a wild 22-second period, but the energy is only 9, so that's more of a weird ocean pulse than a surfable wave.

Bottom line: If you've got a longboard and zero expectations, the 6th of September afternoon might give you something to float around on. Otherwise, keep your board in the car and don't hold your breath.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 15°C on Sun afternoon, min 7°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Thu night. Very mild (max 16°C on Wed afternoon, min 6°C on Fri night). Wind will be generally light.

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
0
0
0
0
0
0
0
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)
0.1
N
7
0.3
NW
16
0.4
NW
12
0.4
NNW
14
0.5
NNW
14
0.4
NW
14
0.7
NW
14
0.4
NW
5
0.4
NW
4
0.7
NW
5
1.2
NNW
7
0.8
N
7
0.8
NNW
6
0.9
N
7
1.2
N
8
0.1
N
11
0.8
NNW
8
0.4
NW
15
0.4
NW
16
0.4
NW
16
Wave Graph
Metric surfscale
Energy kJ
1
0
0
0
0
0
0
0
0
0
0
56
0
77
0
2
0
0
0
0
Wind (km/h)
20
WSW
15
WSW
25
WSW
25
WSW
20
SW
10
SW
15
SW
15
WSW
10
SW
10
W
5
NW
5
WSW
5
W
5
NW
10
SW
20
WSW
10
WSW
10
SW
5
NNW
5
WSW
Wind State
cross-off
off
off
off
off
off
off
off
off
cross-off
glassy
glassy
glassy
cross
off
cross-off
off
off
cross
glassy
High Tide
11:34PM4.21m
12:03PM4.01m
00:09AM4.17m
12:37PM3.98m
00:46AM4.05m
1:12PM3.90m
1:27AM3.87m
1:50PM3.74m
2:15AM3.64m
2:34PM3.52m
3:13AM3.42m
3:37PM3.28m
Low Tide
5:10PM0.62m
5:22AM0.65m
5:43PM0.63m
5:56AM0.66m
6:16PM0.71m
6:33AM0.77m
6:54PM0.87m
7:14AM0.95m
7:38PM1.09m
8:03AM1.17m
8:39PM1.34m
9:04AM1.39m
10:10PM1.53m
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
part cloud
cloud
cloud
part cloud
rain showers
clear
clear
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:52
6:50
6:50
6:48
6:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
6:00
6:01
6:02
6:04
6:05
6:06
 mm
4
Temp °C
15
12
13
12
9
12
13
10
15
16
13
16
16
12
16
15
11
14
15
9
Feels °C
11
6
7
6
4
8
8
6
11
13
12
16
16
11
11
10
7
11
12
6
  • 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 Ruby Bay Surf forecast

The above surf forecast table for Ruby Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ruby Bay can be found by selecting the local surf guide option on the grey menu. Our Ruby 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 (Ruby 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 Ruby 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 Nelson - Tasman Bay? If you are looking for accommodation near Ruby Bay, camping, hotels and holiday cottages in Nelson - Tasman Bay, consider staying in Nelson which is 17 km (11 miles) away. Alternatively, find information about places to stay and car hire in Blenheim which is 80 km (50 miles) away

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