June Gloom explained

Every year, someone moves to Los Angeles in May, rents a place near the beach, and spends the first month wondering where the sun went. Welcome to May Gray and June Gloom, the stretch of late spring and early summer when the coast wakes up under a low, gray ceiling of clouds. It's one of the most predictable things about LA weather, and one of the least advertised.

What's actually happening

The short version: cool ocean, warm air above it, and a lid in between.

The water off Southern California stays cool, even in summer. In late spring, warmer air settles in higher up, creating what forecasters call an inversion: a layer of warm air sitting on top of cooler, moist air near the surface. That cool, moist air near the ocean condenses into a low deck of stratus clouds, the marine layer. The inversion acts like a lid, keeping the clouds trapped close to the ground.

Overnight, the marine layer often pushes inland. In the morning, the sun starts burning it off from the edges, usually clearing inland areas first and working back toward the coast. Some days the beach clears by late morning. Some days it never clears at all.

When it happens

The pattern can show up any time from spring into summer, but it's most persistent in May and June, which is where the nicknames come from. By July, the gray mornings usually become less frequent, and late summer and fall are often the sunniest, warmest months at the beach. September and October are often the best months on the coast for exactly that reason.

How it varies across LA

June Gloom is mostly a coastal story, and that's what makes it useful to understand when you're choosing a neighborhood.

• Right at the coast. In Santa Monica, Venice, Pacific Palisades and Malibu, gray mornings are common in May and June, and some days stay overcast and cool all day.
• A few miles in. In Mar Vista and Brentwood, the clouds often arrive overnight and clear earlier, sometimes by mid-morning.
• Central LA and the Eastside. In Hancock Park, Silver Lake, Los Feliz and Eagle Rock, the marine layer reaches some mornings but usually burns off sooner.
• The Valley. In Studio City and beyond, June is usually sunny and getting hot. The mountains block much of the marine air, so the Valley often sees little of the gloom at all.

Elevation matters too. Homes high in the hills sometimes sit above the marine layer, looking down on a sea of clouds while the flats below are gray. It's one of the more striking sights in the city.

What it means for a home

• It's the coast's air conditioning. The same marine layer that dims June mornings keeps coastal summers mild. Many homes near the beach go without central AC because of it.
• Moisture is part of the deal. Coastal homes see more damp mornings. Ventilation, exterior paint and wood, and signs of moisture are all worth a close look during inspections.
• Solar output dips. If you're counting on solar panels, coastal production can be lower on gray mornings in late spring than you might expect. The rest of the year tends to make up for it.
• Outdoor space works differently. On the coast, the warmest outdoor hours in June are often mid-afternoon. Inland, they're often early morning and evening.

Is it a reason not to live by the beach?

For most people who choose the coast, no. They trade a gray May and June for a cooler summer, a warm and bright fall, and the ocean nearby. Some people prefer sun every day, and for them a few miles inland makes a real difference. The point is to know about it before you sign a lease or buy a house, not after.

If you can, visit in late spring. Spend a morning at the beach and the afternoon in the Valley, and you'll understand LA's weather better than any forecast can explain. For a broader look, see our post on LA weather by area and our guide to moving to Los Angeles.

General information, not advice. Price figures are estimates from public data and may be out of date.