USA

Best Time to Dive in the Outer Banks

34.50°N 76.10°W

Go April to August for the long days — 13.7 hours of light against 10.8. The marine life holds steady all year, so the weather picks the month.

Best time
Apr–Aug
Water
18–28 °C
Visibility
15–30 m
Dived from
day boat
Tidal range
0.8–1.3 m
Species logged
16

Worth knowing: 59% of days see seas over 1.5 m.

Where it is

USA
25 kmN

111 km across · coastline from Natural Earth 10m

Diving in the Outer Banks — monthly breakdown

Best months at this destination

A year of scuba diving conditions at a glance. Hover a month to isolate it.

Month by month conditions, water temperature, visibility and marine life
JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
ConditionsPoorModerateModerateGoodExcellentExcellentModerateGoodPoorExcellentGoodModerate
Water temp (°C)191819202326282828252321
Visibility (m)15–2515–2515–2515–2520–3020–3020–3020–3020–3015–2515–2515–25
Marine lifePeakPeakPeakPeakPeakPeakPeakPeakPeakPeakPeakPeak
Best timePeakPeakPeakPeakPeak
Excellent Good Moderate PoorPeak season Apr–Aug

Long-term averages, 2016–2025. Visibility is estimated from satellite chlorophyll-a. Water temperature is the surface mean; it is cooler at depth.

The Outer Banks diving season

2 seasons

April to November · Peak season

8 months
Water temperature
20–28 °C
Visibility
20–30 m
Rain
13 days a month

Diving conditionsRain is frequent topside. The wind eases.

Marine lifeSand tiger shark (near-guaranteed), Oceanic manta (hit-or-miss), Ocean sunfish (likely), Scalloped hammerhead (hit-or-miss) peak at Outer Banks in these months.

December to March · Shoulder season

4 months
Water temperature
18–21 °C
Visibility
15–25 m
Rain
11 days a month

Diving conditionsThe wind is up.

Marine lifeSand tiger shark (near-guaranteed), Oceanic manta (hit-or-miss), Shortfin mako (hit-or-miss), Basking shark (hit-or-miss) peak at Outer Banks in these months.

  • Water temperature is satellite sea-surface temperature, so expect it cooler below the thermocline.
  • Visibility is estimated from satellite chlorophyll-a.

Outer Banks water temperature and weather

3,175 underwater observation records · 32 surveyed years of ocean data · 10 years of sea temperature

Water & weather

Outer Banks water temperature by month

The dashed line is the monthly average. Eight days in ten fall inside the band.

1015202530JanFebMarAprMayJunJulAugSepOctNovDecSea temperature (°C)

10th to 90th percentile rangemonthly mean

18
rough days a month

Seas top 1.5 m on 59% of days. Enough to cancel a day boat

12
blowy days a month

Gusts over 40 km/h, about where a day boat stays in port

13
wet days a month

5 of them bring heavy rain

Monthly sea state, wind, rain, air temperature and daylight
MonthSwellGusts over 40 km/hWet daysHeavy rainAirDaylight
January3.1 m61%11517 °C9.9 h
February3.0 m59%11418 °C10.8 h
March3.2 m58%11419 °C11.7 h
April3.1 m48%8421 °C12.9 h
May2.9 m30%13524 °C13.8 h
June1.9 m19%15527 °C14.3 h
July1.9 m20%18828 °C14.1 h
August2.3 m15%18728 °C13.3 h
September3.3 m27%15527 °C12.2 h
October2.7 m35%10324 °C11.1 h
November2.9 m46%10421 °C10.2 h
December3.2 m53%12419 °C9.7 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.

Conditions by week, four weeks per month
Week 1January week 1: PoorFebruary week 1: ModerateMarch week 1: PoorApril week 1: ModerateMay week 1: ExcellentJune week 1: GoodJuly week 1: GoodAugust week 1: ExcellentSeptember week 1: PoorOctober week 1: GoodNovember week 1: ExcellentDecember week 1: Good
Week 2January week 2: PoorFebruary week 2: PoorMarch week 2: ModerateApril week 2: ModerateMay week 2: GoodJune week 2: ExcellentJuly week 2: GoodAugust week 2: ExcellentSeptember week 2: PoorOctober week 2: GoodNovember week 2: ModerateDecember week 2: Poor
Week 3January week 3: PoorFebruary week 3: PoorMarch week 3: ModerateApril week 3: ExcellentMay week 3: ExcellentJune week 3: ExcellentJuly week 3: GoodAugust week 3: ExcellentSeptember week 3: PoorOctober week 3: ExcellentNovember week 3: ModerateDecember week 3: Moderate
Week 4January week 4: ModerateFebruary week 4: ModerateMarch week 4: ModerateApril week 4: ExcellentMay week 4: ExcellentJune week 4: ExcellentJuly week 4: ModerateAugust week 4: ModerateSeptember week 4: PoorOctober week 4: ExcellentNovember week 4: ExcellentDecember week 4: Moderate
Excellent Good Moderate PoorBest week to go: fourth of June

June, week by week

WeekConditionsWaterSwellWindRain chance
Week 1Good25 °C2.3 m34 km/h51%
Week 2Excellent26 °C2.0 m34 km/h53%
Week 3Excellent26 °C1.9 m33 km/h50%
Week 4Excellent27 °C1.8 m30 km/h45%

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.

Wetsuit thickness by month
JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
SuitJanuary: 5 mm +February: 7 mmMarch: 5 mm +April: 5 mm +May: 5 mmJune: 3 mmJuly: skinAugust: skinSeptember: 3 mmOctober: 5 mmNovember: 5 mmDecember: 5 mm +
  • Dec–Jan5 mm with hood and gloves
  • Feb7 mm semi-dry
  • Mar–Apr5 mm with hood and gloves
  • May5 mm full suit
  • Jun3 mm full suit
  • Jul–Augskin or 3 mm shorty
  • Sep3 mm full suit
  • Oct–Nov5 mm full suit

Swell through the year

The rough end of each month — nine days in ten come in under it.

JanJanuary: 3.1 metresFebFebruary: 3.0 metresMarMarch: 3.2 metresAprApril: 3.1 metresMayMay: 2.9 metresJunJune: 1.9 metresJulJuly: 1.9 metresAugAugust: 2.3 metresSepSeptember: 3.3 metresOctOctober: 2.7 metresNovNovember: 2.9 metresDecDecember: 3.2 metres

Amber is over 1.5 m.

Tides

springs 1.4 mneaps 0.8 mneapsone lunar month
Daily tidal range across one lunar month.

Tropical storms

15 of the last 30 Septembers saw a tropical storm pass within 250 km. Anything has been recorded May–Nov.

JanJanuary: 0 of 30 yearsFebFebruary: 0 of 30 yearsMarMarch: 0 of 30 yearsAprApril: 0 of 30 yearsMayMay: 2 of 30 yearsJunJune: 3 of 30 yearsJulJuly: 7 of 30 yearsAugAugust: 6 of 30 yearsSepSeptember: 15 of 30 yearsOctOctober: 3 of 30 yearsNovNovember: 1 of 30 yearsDecDecember: 0 of 30 years

Share of the last 30 years with a storm that month.

  • 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

Outer Banks marine life — what you'll see diving

3,175 records within 60 km
SpeciesWhenObserved windowReliabilityEvidenceRecords
Loggerhead turtleAll yearNear-guaranteed
29/32
1248
Sand tiger sharkAll yearNear-guaranteed
23/32
66
Bottlenose dolphinJan–MarNear-guaranteed
23/32
797
Atlantic spotted dolphinAll yearNear-guaranteed
20/32
90
Green turtleNov–JanLikely
16/32
163
Yellowfin tunaMar–AprLikely
11/32
367
Oceanic mantaFeb–Mar, MayHit-or-miss
6/32
51
Shortfin makoFebHit-or-miss
3/32
33
Silky sharkAprHit-or-miss
2/32
50
Basking sharkFebHit-or-miss
3/32
22
Common thresherFeb, AprHit-or-miss
3/32
11
Southern stingrayMar, May, Oct–NovNear-guaranteed
20/32
69
Ocean sunfishMar, Nov–DecLikely
11/32
93
Scalloped hammerheadFeb, Apr, SepHit-or-miss
8/32
25
Humpback whaleFeb–Mar, NovHit-or-miss
8/32
11
Sperm whaleJan, MayHit-or-miss
2/32
9
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 the Outer Banks — common questions

When is the best time to dive the Outer Banks?
Go April to August for the long days — 13.7 hours of light against 10.8. The marine life holds steady all year, so the weather picks the month.
When is the diving season at the Outer Banks?
The diving season at the Outer Banks runs April to August.
Is the diving at the Outer Banks good for beginners?
It is better with some experience. It suits Advanced Open Water divers or equivalent, so newer divers should ask the local operator which sites fit their level.
How warm is the water at the Outer Banks?
Between 18 and 28 °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 at the Outer Banks?
A 7 mm semi-dry covers the coldest water of the year. In the warmest months a skin or 3 mm shorty is enough.
What is the visibility like at the Outer Banks?
Roughly 15 to 30 m depending on the month. That is estimated from satellite chlorophyll-a rather than measured in the water.
What will I see diving the Outer Banks?
The most consistently recorded species are Loggerhead turtle (near-guaranteed), Sand tiger shark (near-guaranteed) and Bottlenose dolphin (near-guaranteed), from 3,175 records within 60 km.
Does the Outer Banks get tropical storms?
Yes. Over 30 years of records a storm passed within 250 km in May–Nov, most often in September at 15 of 30 years.
Is there current at the Outer Banks?
The tide rises and falls 1.3 m around the full and new moon, against 0.8 m in between. How much of that becomes current depends on the shape of the channel.
When should I avoid the Outer Banks?
September is the weakest month for conditions.
How do you dive the Outer Banks?
Mostly from day boats. Trips run through the season, Apr–Aug.