Does Letty Harbour need sun protection in winter?

Not every day. Midwinter middays in Letty Harbour often sit below UV 3, but clear late-winter and early-spring days cross the threshold before summer fully arrives. Check the live index.

Does the water make UV worse in Letty Harbour?

It can. Sand and water reflect ultraviolet, so skin that is not covered (including under the chin and on the tops of feet) picks up extra dose on top of the direct sun. The live UV index on this page is the sky reading; reflection is on top of that.

UV index in Letty Harbour today

Coastal Letty Harbour in Northwest Territories is a high-exposure pocket. At 69.9°N the summer UV index commonly hits 8–10 (very high), and glare off the water means you get it from above and below. This is cool-temperate Canada: summer UV still climbs into the very high band, and spring arrives before the weather feels hot.

Live reading · data by Open-Meteo · reference monitoring by ARPANSA

Today and tomorrow in Letty Harbour

Peak UV, temperature and conditions for Letty Harbour. Tomorrow’s peak is the number to plan around if you’re heading out in the middle of the day.

Weather conditions right now

Cloud and rain cut heat more than they cut UV. A partly cloudy beach day in Letty Harbour can still sit at protection levels. Why you burn on cloudy days.

When Letty Harbour needs sun protection

Sun protection is needed in Letty Harbour typically from May through September, and any clear spring or fall day UV reaches 3. On the water or the sand, reflection can lift your dose even when the forecast UV already looks high.

The threshold, per SunSmart and ARPANSA: whenever UV reaches 3 or above, Slip on covering clothing, Slop on SPF 50+ sunscreen, Slap on a hat, Seek shade and Slide on sunglasses. Read the full sun safety guide.

The UV scale at a glance

0–2Low
3–5Moderate
6–7High
8–10Very high
11+Extreme

Local support in Northwest Territories

Cancer Council NT: Prevention and support for the Top End, where UV stays extreme year-round.

Frequently asked questions

When does Letty Harbour need sun protection?: Whenever the UV index is 3 or above. In Letty Harbour that is typically from May through September, and any clear spring or fall day UV reaches 3. Health authorities use the same UV Index threshold worldwide.
Does Letty Harbour need sun protection in winter?: Not every day. Midwinter middays in Letty Harbour often sit below UV 3, but clear late-winter and early-spring days cross the threshold before summer fully arrives. Check the live index.
Does the water make UV worse in Letty Harbour?: It can. Sand and water reflect ultraviolet, so skin that is not covered (including under the chin and on the tops of feet) picks up extra dose on top of the direct sun. The live UV index on this page is the sky reading; reflection is on top of that.