Canada
Best Time to Dive in Vancouver Island
50.80°N 127.60°W
Go August to September. Conditions are at their best, and the draw is the invertebrate-covered walls of Browning Pass.
- Best time
- Aug–Sep
- Water
- 8–14 °C
- Visibility
- 0–15 m
- Season runs
- Apr–Sep
- Dived from
- day boat and shore diving
- Tidal range
- 2.5–4.5 m
- Species logged
- 3
Worth knowing: water around 13 °C.
Where it is
111 km across · coastline from Natural Earth 10m
Diving in Vancouver Island — monthly breakdown
A year of scuba diving conditions at a glance. Hover a month to isolate it.
| January | February | March | April | May | June | July | August | September | October | November | December | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Conditions | Poor | Poor | Moderate | Good | Excellent | Excellent | Excellent | Excellent | Excellent | Moderate | Poor | Poor |
| Water temp (°C) | 8 | 8 | 8 | 9 | 10 | 12 | 13 | 14 | 13 | 11 | 10 | 9 |
| Visibility (m) | 5–15 | 0–10 | 5–15 | 5–15 | 0–10 | 5–15 | 0–10 | 0–10 | 0–10 | 0–10 | 0–10 | — |
| Marine life | Quiet | Quiet | Quiet | Steady | Steady | Busy | Steady | Busy | Busy | Steady | Quiet | Steady |
| Best time | Peak | Peak |
Excellent Good Moderate PoorPeak season Aug–Sep
Long-term averages, 2016–2025. Visibility is estimated from satellite chlorophyll-a. Water temperature is the surface mean; it is cooler at depth.
The Vancouver Island diving season
March · Shoulder season
1 monthJFMAMJJASOND
- Water temperature
- 8–8 °C
- Visibility
- 5–15 m
- Rain
- 19 days a month
Diving conditionsSeas stay mostly calm. Rain is frequent topside.
April to September · Peak season
6 monthsJFMAMJJASOND
- Water temperature
- 9–14 °C
- Visibility
- under 10 m
- Rain
- 14 days a month
Diving conditionsRain is frequent topside. The wind eases. The sea is calmer.
October · Shoulder season
1 monthJFMAMJJASOND
- Water temperature
- 11–11 °C
- Visibility
- under 10 m
- Rain
- 20 days a month
Diving conditionsRain is frequent topside. The sea is rougher.
November to February · Off season
4 monthsJFMAMJJASOND
- Water temperature
- 8–10 °C
- Visibility
- under 10 m
- Rain
- 20 days a month
Diving conditionsThis is the wet season topside. The wind is up. The sea is rougher.
- Spring tides run 4.5 m against 2.5 m on neaps, so currents build around the full and new moon.
- Water temperature is satellite sea-surface temperature, so expect it cooler below the thermocline.
- Visibility is estimated from satellite chlorophyll-a.
Vancouver Island water temperature and weather
415 underwater observation records · 24 surveyed years of ocean data · 10 years of sea temperature
Water & weather
Vancouver Island water temperature by month
The dashed line is the monthly average. Eight days in ten fall inside the band.
10th to 90th percentile rangemonthly mean
4
rough days a month
Seas top 1.5 m on 13% of days. Enough to cancel a day boat
1
blowy days a month
Gusts over 40 km/h, about where a day boat stays in port
17
wet days a month
7 of them bring heavy rain
| Month | Swell | Gusts over 40 km/h | Wet days | Heavy rain | Air | Daylight |
|---|---|---|---|---|---|---|
| January | 1.9 m | 8% | 21 | 10 | 7 °C | 8.2 h |
| February | 1.9 m | 1% | 18 | 7 | 6 °C | 9.8 h |
| March | 1.4 m | 1% | 19 | 7 | 9 °C | 11.5 h |
| April | 1.5 m | 2% | 17 | 5 | 12 °C | 13.6 h |
| May | 1.1 m | 0% | 15 | 4 | 15 °C | 15.3 h |
| June | 1.1 m | 0% | 17 | 4 | 17 °C | 16.3 h |
| July | 1.0 m | 0% | 12 | 2 | 19 °C | 15.9 h |
| August | 0.9 m | 0% | 10 | 3 | 20 °C | 14.3 h |
| September | 1.2 m | 1% | 15 | 6 | 18 °C | 12.4 h |
| October | 1.7 m | 3% | 20 | 10 | 13 °C | 10.4 h |
| November | 1.9 m | 6% | 21 | 11 | 9 °C | 8.6 h |
| December | 2.0 m | 8% | 21 | 11 | 6 °C | 7.7 h |
Swell is the rough end of the month: nine days in ten come in under it. Sea temperature covers 10 years, waves 4.
Pick your week
48 weeks from the daily record. Darker is better, against this site's own year. Pick a month for the detail.
| Week 1 | January week 1: Poor | February week 1: Moderate | March week 1: Moderate | April week 1: Moderate | May week 1: Excellent | June week 1: Excellent | July week 1: Excellent | August week 1: Excellent | September week 1: Excellent | October week 1: Moderate | November week 1: Poor | December week 1: Poor |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Week 2 | January week 2: Poor | February week 2: Poor | March week 2: Moderate | April week 2: Moderate | May week 2: Excellent | June week 2: Good | July week 2: Excellent | August week 2: Excellent | September week 2: Excellent | October week 2: Moderate | November week 2: Poor | December week 2: Poor |
| Week 3 | January week 3: Poor | February week 3: Poor | March week 3: Good | April week 3: Good | May week 3: Excellent | June week 3: Excellent | July week 3: Excellent | August week 3: Excellent | September week 3: Good | October week 3: Poor | November week 3: Poor | December week 3: Poor |
| Week 4 | January week 4: Poor | February week 4: Poor | March week 4: Good | April week 4: Excellent | May week 4: Excellent | June week 4: Excellent | July week 4: Excellent | August week 4: Excellent | September week 4: Good | October week 4: Poor | November week 4: Poor | December week 4: Poor |
Excellent Good Moderate PoorBest week to go: first of August
January, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Poor | 8 °C | 1.9 m | 25 km/h | 71% |
| Week 2 | Poor | 8 °C | 1.9 m | 26 km/h | 69% |
| Week 3 | Poor | 8 °C | 1.6 m | 24 km/h | 63% |
| Week 4 | Poor | 8 °C | 1.7 m | 23 km/h | 64% |
February, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Moderate | 8 °C | 1.7 m | 22 km/h | 63% |
| Week 2 | Poor | 8 °C | 1.8 m | 21 km/h | 58% |
| Week 3 | Poor | 8 °C | 2.0 m | 20 km/h | 60% |
| Week 4 | Poor | 8 °C | 1.9 m | 20 km/h | 68% |
March, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Moderate | 8 °C | 1.8 m | 20 km/h | 69% |
| Week 2 | Moderate | 8 °C | 1.6 m | 19 km/h | 63% |
| Week 3 | Good | 8 °C | 1.5 m | 18 km/h | 62% |
| Week 4 | Good | 8 °C | 1.4 m | 18 km/h | 62% |
April, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Moderate | 8 °C | 1.5 m | 20 km/h | 62% |
| Week 2 | Moderate | 8 °C | 1.6 m | 20 km/h | 59% |
| Week 3 | Good | 9 °C | 1.4 m | 20 km/h | 53% |
| Week 4 | Excellent | 9 °C | 1.1 m | 19 km/h | 55% |
May, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Excellent | 9 °C | 0.9 m | 18 km/h | 56% |
| Week 2 | Excellent | 10 °C | 1.0 m | 17 km/h | 52% |
| Week 3 | Excellent | 10 °C | 1.3 m | 19 km/h | 45% |
| Week 4 | Excellent | 11 °C | 1.2 m | 19 km/h | 51% |
June, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Excellent | 11 °C | 1.1 m | 18 km/h | 59% |
| Week 2 | Good | 11 °C | 1.3 m | 18 km/h | 60% |
| Week 3 | Excellent | 12 °C | 1.1 m | 17 km/h | 54% |
| Week 4 | Excellent | 12 °C | 0.9 m | 17 km/h | 44% |
July, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Excellent | 13 °C | 0.9 m | 16 km/h | 41% |
| Week 2 | Excellent | 13 °C | 1.0 m | 16 km/h | 41% |
| Week 3 | Excellent | 13 °C | 1.0 m | 17 km/h | 39% |
| Week 4 | Excellent | 14 °C | 0.9 m | 16 km/h | 34% |
August, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Excellent | 14 °C | 0.8 m | 16 km/h | 26% |
| Week 2 | Excellent | 14 °C | 1.0 m | 17 km/h | 25% |
| Week 3 | Excellent | 14 °C | 1.0 m | 17 km/h | 31% |
| Week 4 | Excellent | 13 °C | 0.8 m | 16 km/h | 37% |
September, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Excellent | 13 °C | 1.0 m | 15 km/h | 40% |
| Week 2 | Excellent | 13 °C | 1.0 m | 15 km/h | 45% |
| Week 3 | Good | 13 °C | 1.2 m | 17 km/h | 57% |
| Week 4 | Good | 12 °C | 1.6 m | 18 km/h | 60% |
October, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Moderate | 12 °C | 1.5 m | 17 km/h | 57% |
| Week 2 | Moderate | 11 °C | 1.6 m | 19 km/h | 61% |
| Week 3 | Poor | 11 °C | 1.8 m | 21 km/h | 71% |
| Week 4 | Poor | 11 °C | 1.8 m | 21 km/h | 70% |
November, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Poor | 10 °C | 2.0 m | 22 km/h | 68% |
| Week 2 | Poor | 10 °C | 1.9 m | 23 km/h | 73% |
| Week 3 | Poor | 10 °C | 1.9 m | 23 km/h | 71% |
| Week 4 | Poor | 9 °C | 1.8 m | 21 km/h | 67% |
December, week by week
| Week | Conditions | Water | Swell | Wind | Rain chance |
|---|---|---|---|---|---|
| Week 1 | Poor | 9 °C | 1.7 m | 19 km/h | 64% |
| Week 2 | Poor | 9 °C | 1.7 m | 22 km/h | 65% |
| Week 3 | Poor | 9 °C | 2.1 m | 24 km/h | 68% |
| Week 4 | Poor | 9 °C | 2.3 m | 25 km/h | 69% |
10 years of daily records, averaged into weeks.
Gear & storms
What to wear
Off the coldest water of each month, not the average — that is what the suit has to cope with.
| January | February | March | April | May | June | July | August | September | October | November | December | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Suit | January: dry | February: dry | March: dry | April: dry | May: dry | June: dry | July: dry | August: dry | September: dry | October: dry | November: dry | December: dry |
One suit covers the whole year: a drysuit.
Swell through the year
The rough end of each month — nine days in ten come in under it.
Amber is over 1.5 m.
Tides
Tropical storms
No tropical storm has come within 250 km in 30 years of records. Swell and wind set the season, not cyclones.
- NOAASea surface temperature, from OISST and MUR
- ERA5Wind, waves, rain and air temperature, via Open-Meteo
- OBISMarine species records within 60 km
- IBTrACSTropical cyclone tracks, 1996 to 2025
Vancouver Island marine life — what you'll see diving
| Species | When | Observed window | Reliability | Evidence | Records |
|---|---|---|---|---|---|
| Humpback whale | Aug–Sep | Near-guaranteed | 247 | ||
| Orca | Jul–Sep | Near-guaranteed | 89 | ||
| Harbour seal | Jun, Aug–Sep | Likely | 52 |
Peak Present
- Observed window
- Months with records. Peak is where most of them fall.
- Reliability
- Near-guaranteed in 60% of surveyed years or more
- Likely 30% to 60%
- Hit-or-miss under 30%
- Evidence
- Years it was seen, out of the years anyone surveyed.
- Records
- OBIS sightings within 60 km.
These are sightings people logged, not a full survey of the reef. A species missing from a month may just mean nobody recorded one.
Diving Vancouver Island — common questions
- When is the best time to dive Vancouver Island?
- Go August to September. Conditions are at their best, and the draw is the invertebrate-covered walls of Browning Pass.
- When is the diving season in Vancouver Island?
- The diving season in Vancouver Island runs April to September, and it is at its best August to September.
- Is the diving in Vancouver Island good for beginners?
- Not really. It is for experienced divers, so it is not a place to learn or to make your first dives after certification.
- How warm is the water in Vancouver Island?
- Between 8 and 14 °C at the surface across the year, coldest in February and warmest in August. It runs cooler below the thermocline.
- What wetsuit do I need in Vancouver Island?
- A drysuit covers the coldest water of the year. The same suit works all year.
- What is the visibility like in Vancouver Island?
- Roughly 0 to 15 m depending on the month. That is estimated from satellite chlorophyll-a rather than measured in the water.
- What will I see diving Vancouver Island?
- The most consistently recorded species are Humpback whale (near-guaranteed), Orca (near-guaranteed) and Harbour seal (likely), from 415 records within 60 km.
- Does Vancouver Island get tropical storms?
- No. None has passed within 250 km in 30 years of records.
- Is there current in Vancouver Island?
- The tide rises and falls 4.5 m around the full and new moon, against 2.5 m in between. How much of that becomes current depends on the shape of the channel.
- When should I avoid Vancouver Island?
- November–January are the weakest months for conditions.
- How do you dive Vancouver Island?
- Mostly from day boats and the shore. Trips run through the season, Apr–Sep.