Surf Forecasts:
Ruby Bay surf forecast from 4 Sep 2026:
- Best quality surf: Sunday 6 Sep, 9PM (local time) - 5ft (1.5m), 7s period, N swell with glassy winds.
- Most powerful swell: Sunday 6 Sep, 9PM (local time) - 5ft (1.5m), 7s period, N swell with 236 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 9PM (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 9PM. The primary swell is predicted to be 1.5m and 7s period. The wind is predicted to be glassy 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 9PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 7s period and expected on Sunday (Sep 06) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 6th Sep) | 5ft (1.5m) 7s |
| Best Surf | 9PM (Sun 6th Sep) | 5ft (1.5m) 7s |
| Most Powerful | 9PM (Sun 6th Sep) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
Alright folks, ol' Rusty here, staring down the charts for Ruby Bay and, gotta be straight with ya, it's a tough one. This 16-day window starting now is looking real quiet, a proper lull, so if you're itchin' for a paddle, you might wanna take up fishin' for a bit.
We've got a block of nothing for the first few days. The water temp is sittin' about average for this time of year, so no rude shocks there, just nothin' to ride. Saturday the 5th we see a tiny 1 ft ripple from the North with a short period, but it's just a blip. Sunday the 6th morning has a pulse to 3 ft from the NNW, period a dismal 6 seconds. Still "poor surf conditions" across the board. This pattern of tiny, weak swell continues right through until around Wednesday the 16th of September – we're talking a solid week and a half with next to nothing. There are some glassy mornings and some offshore winds, but with no swell to work with, it's just a pretty lake.
Now, towards the tail end, there’s a tiny flicker of hope but not enough to get excited about. Friday the 18th of September morning shows a 0.7 ft wave from the North. Day after that, maybe another 0.7 ft. The winds are offshore most of the time, which would be magic if there was any swell to clean up.
Bottom line, Ruby Bay is a sheltered, rarely breaking beginner spot at the best of times, and this run shows no decent surf at all. If you were hoping for a wave, you're out of luck. Don't blame the spot though – it's just a flat spell.
Stay frosty.
Rusty
Short Range ForecastHeavy rain (total 56mm), heaviest during Sun night. Very mild (max 14°C on Sat afternoon, min 7°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Mon night. Very mild (max 12°C on Wed afternoon, min 7°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | N 7 | NW 15 | N 7 | NNW 6 | NNW 6 | NNW 6 | N 7 | N 7 | N 8 | N 8 | N 8 | N 9 | N 8 | N 15 | N 8 | N 7 | NNW 4 | N 5 | NNW 19 |
Wave Graph  | |||||||||||||||||||
 kJ | 0 | 0 | 8 | 47 | 72 | 0 | 134 | 59 | 41 | 91 | 69 | 78 | 35 | 4 | 10 | 4 | 7 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-off | glassy | glassy | glassy | glassy | glassy | cross-off | cross-off | glassy | cross-on | glassy | glassy | on | off | off | off | glassy |
High Tide | 3:13AM3.42m | 3:37PM3.28m | 4:28AM3.25m | 5:21PM3.15m | 5:57AM3.23m | 7:12PM3.34m | 7:19AM3.38m | 8:17PM3.67m | 8:24AM3.62m | 9:03PM3.96m | 9:17AM3.86m | 9:44PM4.16m | |||||||
Low Tide | 9:04AM1.39m | 10:10PM1.53m | 10:24AM1.54m | 11:47PM1.50m | 12:02PM1.52m | 1:06AM1.29m | 1:28PM1.32m | 2:06AM1.00m | 2:31PM1.06m | 2:55AM0.74m | 3:19PM0.82m | ||||||||
 |  | |  |  |  |  | | |  | |  |  | | | | |  | | |
 | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — |
 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — |
mm | — | — | — | 1 | 1 | 9 | 34 | 5 | 6 | 3 | — | — | — | — | — | — | — | 1 | — |
Temp °C | 11 | 13 | 14 | 11 | 12 | 12 | 13 | 8 | 8 | 8 | 10 | 10 | 9 | 11 | 12 | 8 | 11 | 10 | 6 |
Feels °C | 6 | 11 | 11 | 10 | 11 | 12 | 14 | 6 | 5 | 6 | 8 | 8 | 8 | 9 | 10 | 6 | 9 | 5 | 2 |
Swell 1 Height (m) Direction Period (s) | N 7 | N 7 | NNW 5 | NW 16 | — | — | NNW 16 | N 7 | ESE 4 | N 8 | N 8 | N 9 | N 8 | NNW 8 | N 8 | NNW 5 | N 7 | N 5 | NNW 19 |
| kJ | 38 | 28 | 24 | 64 | — | — | 25 | 59 | 18 | 91 | 69 | 78 | 35 | 13 | 10 | 7 | 1 | 13 | 37 |
Swell 2 Height (m) Direction Period (s) | NNW 10 | NW 15 | NW 15 | — | — | — | — | NW 16 | N 8 | NW 14 | N 11 | — | ENE 4 | ENE 4 | NNW 13 | N 7 | NW 18 | NW 17 | NW 12 |
| kJ | 37 | 58 | 59 | — | — | — | — | 10 | 41 | 8 | 2 | — | 1 | 1 | 16 | 4 | 12 | 11 | 5 |
Swell 3 Height (m) Direction Period (s) | NW 15 | — | N 7 | — | — | — | — | — | E 7 | — | — | — | — | N 15 | N 20 | NW 12 | — | NW 21 | — |
| kJ | 9 | — | 8 | — | — | — | — | — | 1 | — | — | — | — | 4 | 8 | 6 | — | 18 | — |
Wind waves Height (m) Direction Period (s) | — | — | NW 15 | NNW 6 | NNW 6 | NNW 6 | N 7 | ESE 4 | SSE 4 | SW 3 | — | — | — | — | NNE 3 | — | NNW 4 | SW 2 | W 3 |
| kJ | — | — | 903 | 47 | 72 | 130 | 134 | 29 | 34 | 2 | — | — | — | — | 1 | — | 7 | 1 | 4 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 272 | 115 | 129 | 14 | 14 | 129 | 7 | 14 | 14 | 14 | 14 | 83 | 30 | 83 | 83 | 83 | 88 | 142 | 14 |
Best forecast wave conditions in Nelson - Tasman Bay | |||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||
Header Global | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Ruby Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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