Ruby Bay Surf Break

Lat Long: 41.21° S 173.09° E

Ruby Bay Surf Forecast and Surf Report

Issued: 5 pm 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ruby Bay sea temperature is
12.3°C
0.0° 

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 31 Aug 2026:

  • Best quality surf: Friday 4 Sep, 9AM (local time) - 6ft (1.9m), 9s period, N swell with cross-offshore winds.
  • Most powerful swell: Friday 4 Sep, 9AM (local time) - 6ft (1.9m), 9s period, N swell with 567 kJ wave energy.
  • Next surfable swell (1★+): Friday 4 Sep, 9AM (local time) - 6ft (1.9m), 9s 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 Friday (Sep 04) at 9AM. The primary swell is predicted to be 1.9m and 9s 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 1.9m 9s and forecast to arrive on Friday (Sep 04) at 9AM. 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+) 9AM (Fri 4th Sep)6ft (1.9m) 9s
Best Surf 9AM (Fri 4th Sep)6ft (1.9m) 9s
Most Powerful 9AM (Fri 4th Sep)6ft (1.9m) 9s

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


The Lowdown

Alright, folks, ol’ Rusty here. Let’s be straight with you: it’s a quiet stretch for Ruby Bay. We’ve got a solid 16-day window but the surf is barely a whisper through most of it. There’s a few days where you might paddle out, but don’t expect much.

The pattern starts with nothing. August 31st through the whole of the first week is flat as a pancake, with the combined energy of all swells directed here at zero (0) more often than not. Strong offshore winds on the 1st and 2nd keep the surface clean, but there’s no swell to ride. It’s a classic case of “the ocean is taking a nap.”

Then, on Friday the 4th, we get a little spike. The morning shows a 6 ft swell from the North, with a period of 9 seconds. The combined energy of all swells directed here hits a moderate 567, which is about the only real pulse in the entire forecast. The wind is a light offshore breeze from the West, keeping things clean. This is the best the window has to offer, but it’s still a “poor surf conditions” read for the day overall. The swell is a bit over 5 ft, so it’s a bit much for total beginners, but for anyone who’s been out a few times, it’s the only game in town. The water temp is about 54°F and the anomaly is 0.0°, so it’s about average for this time of year.

The afternoon of the 4th drops off quick, and we’re back to next to nothing. Sunday the 6th has a weak 5 ft, 7-second swell from the North (combined energy 210) but it’s accompanied by rain and a light offshore, so it’s surfable but very ordinary. After that, the rest of the 16 days is a string of 0.3 ft or flat conditions, glassy mornings, and onshore afternoon breezes, especially from the 7th onwards. The combined energy of all swells directed here is mostly in the single digits or low double digits for the rest of the run.

So, the only standout is the morning of Friday the 4th. It’s not going to be epic, but it’s the only time the ocean gives you a pulse. For a break that rarely breaks, this is about as good as it gets in this window. Don’t expect crowds because it’s rarely breaking, but if you’re there on that morning, you might have it to yourself. The rest of the forecast is a write-off. Costa’s not looking good for paddle surfing, folks.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 16°C on Thu morning, min 7°C on Mon night). Winds decreasing (fresh winds from the WSW on Mon afternoon, calm by Thu morning).

Days 5-7 Weather Summary

Heavy rain (total 29mm), heaviest during Thu night. Very mild (max 16°C on Thu afternoon, min 6°C on Fri night). Wind will be generally light.

Mon
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
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
2
0
0
0
0
0
0
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)
0.4
NW
11
0.6
NNW
14
0.4
NW
15
0.2
NNW
15
0.4
NW
5
0.1
N
18
0.6
NNW
5
0.9
NNW
6
0.1
N
15
1
N
6
1.1
NNW
7
1.9
N
9
1.1
N
9
0.8
N
8
0.4
NW
15
0.4
NW
15
1.1
NW
6
1.5
N
6
1.4
N
7
0.9
NNW
8
Wave Graph
Metric surfscale
Energy kJ
0
0
0
0
0
6
0
47
4
73
0
567
181
92
0
0
83
0
210
0
Wind (km/h)
30
WSW
20
SW
10
SW
15
WSW
15
SW
15
SW
10
WSW
0
SW
0
SSW
5
SW
5
NNW
10
W
20
WSW
5
SW
10
SW
5
NW
5
WSW
5
NNW
10
SW
10
SW
Wind State
off
off
off
off
off
off
cross-off
glassy
glassy
glassy
cross
cross-off
cross-off
off
off
cross
glassy
glassy
off
off
High Tide
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
4:28AM3.25m
5:21PM3.15m
Low Tide
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
10:24AM1.54m
11:47PM1.50m
clear
clear
clear
part cloud
part cloud
part cloud
cloud
cloud
part cloud
cloud
rain showers
rain showers
clear
clear
part cloud
part cloud
rain showers
heavy rain
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:52
6:50
6:50
6:48
6:46
6:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
6:01
6:02
6:04
6:05
6:06
6:07
 mm
13
2
1
13
1
Temp °C
12
10
12
13
10
15
15
12
16
16
13
14
14
8
15
15
8
11
13
8
Feels °C
5
4
7
8
6
11
12
11
15
15
13
12
9
5
12
12
5
10
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 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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