September: 86 places at their best

United States, North America

San Diego in May

Overcast mornings are common at the coast. Inland spots are sunnier.

Quiet valueMild, highs near 69F (21C), May Gray marine layer
Sea lions resting at La Jolla, San Diego
San DiegoPhoto: Rhododendrites, CC BY-SA 4.0

The straight answer

May is a quiet, good-value month to visit San Diego. Overcast mornings are common at the coast. Inland spots are sunnier.

Weather
Mild, highs near 69F (21C), May Gray marine layer
Crowds
3 of 5
Prices
3 of 5

What May is like in San Diego

May is when the marine layer moves in. Locals call it May Gray: mornings on the coast are often cloudy and cool, and the sun may not break through until afternoon, if at all. Highs reach about 69F (21C), and it rarely rains. Inland spots like the Safari Park are sunnier and warmer. Crowds and prices are moderate until Memorial Day weekend.

This month suits sightseers, zoo and museum fans, and anyone happy with mild, soft weather at fair prices. It can disappoint people who picture sunny beach days, since the coast can stay gray for a week at a time. For reliable sun and warm water, pick August through October.

Make the most of May

What is especially good about San Diego this month.

01

Sunny inland days

When the coast is gray, head inland. The Safari Park in Escondido often sits in full sun while the beaches stay cloudy.

02

Shoulder season rates

Hotels by the water are cheaper than in summer, and the zoo and Midway are calm on weekdays before school lets out.

03

Cool hiking weather

Overcast mornings make Torrey Pines and the Cabrillo trails comfortable to hike, with no harsh midday sun.

What to pack for May

  • A light hoodie or fleece for gray coastal mornings
  • Sunscreen, since UV gets through the clouds
  • Walking shoes for the zoo and Balboa Park
  • A light scarf or layer for breezy evenings by the water

Our timing tip

Plan beach time for the afternoon, when the marine layer is most likely to burn off, and spend gray mornings at the zoo or inland.

Book San Diego for May.

Sponsored links to Expedia and Vrbo. We may earn a commission; it never changes a verdict.

Things to do in San Diego

Full guide
01

San Diego Zoo

Go at opening; the animals are most active in the morning. Plan a full day.

Official site ↗Tickets and tours →

02

Balboa Park

Seventeen museums, gardens, and Spanish Colonial buildings. Many museums close one day a week, so check.

Official site ↗Tickets and tours →

03

La Jolla Cove

Sea lions, seals, and snorkeling. Best in early fall when the water is warmest.

Tickets and tours →

04

Cabrillo National Monument

Point Loma views, tide pools at low tide in winter, and gray whale watching from December through March.

Official site ↗Tickets and tours →

05

USS Midway Museum

A walk-through aircraft carrier on the bay. A hit with kids.

Official site ↗Tickets and tours →

06

San Diego Zoo Safari Park

Open-range animal habitats in Escondido, about 45 minutes north.

Official site ↗Tickets and tours →

Beat the crowds

  • Avoid Comic-Con week downtown unless you are going. Stay in La Jolla or Coronado if dates overlap.
  • Hit La Jolla Cove and Torrey Pines early in the morning. Parking fills fast by late morning in summer.
  • Visit the zoo on a weekday outside school holidays.
  • Choose September and October for summer weather without summer prices.

Know before you go

  • The city runs fully year-round. Some Balboa Park museums close one weekday each week.
  • Beach water quality advisories can close stretches of shoreline after rain, especially near the Tijuana River in the South Bay. Check before swimming.
  • Santa Ana wind events in fall can bring heat and fire danger to the region.

San Diego in May, quick answers

Is May a good time to visit San Diego?

May is a quiet, good-value month to visit San Diego. Overcast mornings are common at the coast. Inland spots are sunnier.

What is the weather like in San Diego in May?

Mild, highs near 69F (21C), May Gray marine layer.

Is San Diego crowded in May?

Crowds in San Diego are moderate in May; timed bookings still help at the biggest sights.

Keep planning San Diego.

The months either side, and the best one if this is not it.

  1. 01San Diego in AprilThe month before: Mild, highs near 68F (20C)Good
  2. 02San Diego in JuneThe month after: Mild, highs near 71F (22C), June GloomQuiet value
  3. 03San Diego in SeptemberThe next best month: Warm, highs near 77F (25C), warm oceanBest

Also at their best in May

Everywhere in May

Where else is good in May?

Tell us when you can go and what kind of trip you want. We rank every place we cover for that exact month.

What kind of trip? Pick any.

Before you book.

Sort these two things first.

Sponsored links. We may earn a commission; it never changes a verdict.

  • Travel insurance.

    Faye

    A missed connection, a bag that never turns up, a hospital abroad: far cheaper to cover before departure than to argue about after.

    Visit Faye
  • eSIM data.

    Saily

    Set up an eSIM before you fly so your phone has data the moment you land, without roaming charges.

    Visit Saily

Our top-rated travel gear

Whatever you decide, this is the gear we actually travel with: verified, priced, and ranked. Live price check on each.

Packing CubesEagle Creek Pack-It Reveal Compression Set

Eagle Creek Pack-It Reveal Compression Set

compression set

Check price ~$50
ChargerAnker Nano II 65W

Anker Nano II 65W

65W GaN listed

Check price ~$30
TrackerApple AirTag (4-Pack)

Apple AirTag (4-Pack)

4 per pack listed

Check price ~$89
Travel PillowTrtl Travel Pillow

Trtl Travel Pillow

packs flat

Check price ~$65
AdapterEPICKA Universal Travel Adapter

EPICKA Universal Travel Adapter

all-region listed

Check price ~$20
Luggage ScaleEtekcity Luggage Scale

Etekcity Luggage Scale

handheld hook

Check price ~$10

As an Amazon Associate we may earn from qualifying purchases, at no cost to you.