What to Wear in Key West in May
Key West in May is the calm pre-hurricane shoulder — 30°C / 86°F afternoons, 24°C / 75°F nights, 6 rain days. Lower rates than April, before June doubles the rain.
- Lightweight cotton or linen — Atlantic-Caribbean tropical
- Kino Sandals (Key West 1966) — $35-50 handmade huaraches
- Margaritaville or Tommy Bahama Hawaiian-style shirts
- Swim cover-up — Duval Street allows it, beaches expect it
- Light cardigan — Duval Street bars and restaurants AC
- Reef-safe SPF 50 — Florida Keys National Marine Sanctuary
- Synthetic — Atlantic-Caribbean humidity sticks fast
- Formal leather — heat warps shoes, Key West runs casual
- Heavy denim — 24°C / 75°F overnights stay hot
Key West in May runs Atlantic-Caribbean shoulder season. NOAA Key West (EYW) data put afternoon highs at 30°C / 86°F and overnight lows at 24°C / 75°F with 6 rain days; UV index 11 (extreme), humidity 75%. The dressing register reads Conch Republic resort: cotton or linen everything, Margaritaville-print or Tommy Bahama Hawaiian-style shirts, Lilly Pulitzer (Palm Beach 1959 — Key West-popular pastel-print shifts), Caribbean Soul tees, La Te Da resort-wear, plus the heritage Kino Sandals (Key West-founded 1966 by Roberto and Margarita Lopez — $35-50 handmade leather huaraches at the Fitzpatrick Street workshop, the recognized local heritage souvenir). Conch Republic Independence (April 23 each year, the heritage 1982 secessionist micro-nation born of a US Border Patrol roadblock) sets the local tone of irreverent-Bahamian-Bahama pirate tradition; Hemingway Days runs around July 21 at Sloppy Joe's. Reef-safe SPF 50 mandatory inside the Florida Keys National Marine Sanctuary (which surrounds the island). Hurricane season opens June 1 — May is the last calm month before the cycle.
Key West May is the Conch Republic at its calmest — Mallory Square sunset celebration at peak walking weather, the Hemingway House cats lounging on the balconies, the Kino Sandals workshop turning out 50 pairs a day. Linen + cotton + Hawaiian shirt + reef-safe SPF.
The capsule
01Lightweight cotton sundress or linen midiNOAA EYW logs 30°C / 86°F afternoons through May with 75% humidity and 12-knot easterly trades. Cotton in coral, ivory, or sand for the Mallory Square sunset celebration; linen in oat for the Café Marquesa (Old Town, since 1989 — the heritage Key West fine dining) reservation. Skip rayon — humidity wrinkles fast.
02Linen wide-leg trousers or cotton shortsDaily wear at Duval Street (the heritage 1.25-mile main artery, Atlantic-to-Gulf), the Hemingway Home & Museum (the heritage 1851 Whitehead Street stone house, six-toed cat colony), and the Truman Little White House. Linen in flax for the Latitudes Restaurant Sunset Key reservation; cotton shorts for Higgs Beach paddleboard.
03Kino Sandals (Key West 1966) — leather huarachesKino Sandals (Roberto and Margarita Lopez, founded 1966 in Key West — handmade at the Fitzpatrick Street workshop, $35-50 the local heritage huarache) in cognac or natural for daily Old Town walking. Slip-on, foot-shaped, the recognized Key West souvenir. Skip flip-flops at evening; Kino sandals read as casual-correct.
04Swim + cotton cover-upAtlantic sea sits at 26°C / 79°F per NOAA. Cotton cover-up in white or pastel for Higgs Beach swim and the Smathers Beach (the heritage south-shore beach, walking distance from Old Town) day. Duval Street accepts swim cover-ups in the daytime; evening expects cover-up + linen trousers minimum at recognized restaurants.
05Light cardiganDuval Street bars (Sloppy Joe's, Captain Tony's, Hog's Breath) and the recognized restaurants run AC at 18-20°C / 64-68°F to fight the 24°C / 75°F overnight humidity. Cotton or merino in ivory layers under the Hawaiian shirt for the Café Marquesa or Latitudes evening reservation.
06Wide-brim sun hat + polarized sunglasses + reef-safe SPF 50Atlantic UV index 10-11 (extreme) by 10am. Florida Keys National Marine Sanctuary (which surrounds Key West) increasingly recommends mineral-only reef-safe sunscreens — pack zinc-based SPF (Stream2Sea, Sun Bum Mineral, Thinksport) for the Dry Tortugas day-trip and the Sand Key reef snorkel. Hat brim 4 inches minimum; polarized lenses cut the Atlantic glare on the catamaran sunset sail.
07Margaritaville-print or Tommy Bahama Hawaiian-style shirt — for eveningThe Margaritaville Café (Duval Street, founded 1985 by Jimmy Buffett — the local Key West heritage brand) sells the recognized parrothead palm-print shirts. Tommy Bahama (Florida-popular Hawaiian-shirt heritage) reads correct at every Old Town restaurant; tucking optional. Pair with linen trousers and Kino sandals at Café Marquesa, Latitudes, or El Meson de Pepe (the heritage Cuban institution at Mallory Square).
08Crossbody bag + reusable water bottleDuval Street is the heritage walking strip; the Hemingway Home, Truman Little White House, and Mel Fisher Maritime Museum sit within a 15-minute walk. Crossbody in canvas keeps hands free; 1L water bottle covers the 30°C / 86°F afternoon when the trade-wind humidity dehydrates fast. Skip pricey bottled water — the Old Town hydration stations are free.
Day to night
Cotton sundress · Kino sandals · sun hat · sunglasses · reef-safe SPF 50 · crossbody · water bottle. Coffee at Cuban Coffee Queen 7am, Hemingway Home 9am, Smathers Beach 11am.
Linen trousers · Margaritaville or Tommy Bahama shirt · cardigan · Kino sandals. Dinner at Café Marquesa or Latitudes 19:00; Mallory Square sunset celebration after.
A suggested look — coral and pink palm-print strappy cotton sundress, natural straw wide-brim hat, tortoise sunglasses, cognac woven leather huarache sandals.
What to avoid
- Synthetic — humidity sticks in 24°C / 75°F overnights
- Formal leather — salt and heat warp shoes
- Heavy denim — overnight heat
- Miami-formal restaurant codes — Key West is Conch Republic casual
- Drone photography over Hemingway Home cats — banned by city ordinance
Frequently asked questions
Per NOAA Key West (EYW): average daily high 30°C (86°F), low 24°C (75°F), 6 rain days totalling 95mm. Atlantic-Caribbean shoulder season — calm pre-hurricane window. UV index 11 (extreme). Sea temperature 26°C / 79°F. Daylight 13h 20m. 12-knot easterly trades. Humidity 75%. The last calm month before the June 1 hurricane-season opening.
Kino Sandals (founded 1966 in Key West by Roberto and Margarita Lopez) are the heritage Key West handmade leather huaraches — flat, foot-shaped, slip-on, made on-site at the Kino Sandals workshop on Fitzpatrick Street (corner of Greene), priced $35-50. Available in cognac, natural, brown, and black; styles include the heritage 'Original' (criss-cross), 'Fisherman' (T-bar), and women's 'Bahama' (slim straps). Buy on-site (the workshop produces ~50 pairs daily, the heritage Key West souvenir); the leather molds to your foot within a week. Mainland online stocks limited; the workshop sale is the recognized way.
The Conch Republic (founded April 23, 1982) is the heritage Key West secessionist micro-nation, born of a US Border Patrol roadblock at the top of the Florida Keys (the Border Patrol set up a checkpoint searching for drugs and undocumented immigrants, snarling traffic; Key West Mayor Dennis Wardlow seceded in protest, declared war on the US, surrendered after one minute, and demanded $1 billion in foreign aid). The annual Conch Republic Independence Celebration (April 22-30) brings parades, regattas, and the heritage flag-raising. The Conch Republic flag (sea-blue with conch-shell-and-sun) flies above many Old Town businesses. Pack: lightweight cotton, Conch Republic tee or pirate bandana, leather huaraches.
Yes, if you can book — the Yankee Freedom ferry (the only daily ferry, departs 8am from Key West Bight, returns 5:30pm) is the heritage way to reach Dry Tortugas National Park (70 miles west of Key West, the heritage 19th-century Fort Jefferson on Garden Key, the most-cited Florida snorkel reef). Books 3-6 months ahead. Pack: swim under linen, cotton cover-up, reef-safe SPF 50 mineral (the operators strongly recommend mineral-only), wide-brim sun hat, polarized sunglasses, Kino sandals, light cardigan for the ferry AC, water bottle, snacks (lunch included on the Yankee Freedom). The fort is pre-Civil War; the snorkel reef is among the most-cited in the National Park system.
Conch Republic casual at every Key West restaurant — even the recognized fine dining. Café Marquesa (Old Town since 1989, the most-cited Key West fine dining); Latitudes (Sunset Key, beachfront — book the ferry shuttle at the Margaritaville dock); El Meson de Pepe (the heritage Cuban institution at Mallory Square, paella + black beans); Blue Heaven (Bahama Village, the heritage breakfast institution, courtyard with chickens — cash only); Mr. Z's New York Cuisine (Old Town deli); Mangoes (Duval Street, since 1989); Half Shell Raw Bar (the Historic Seaport, oysters and stone crab claws). Pack: linen trousers + Hawaiian shirt for men; cotton sundress + Kino sandals for women; light cardigan for AC. No formal leather, no swimwear at evening, no flip-flops at recognized restaurants. Key West dining 18:00-22:00 (later than mainland).
Sources
- NOAA — 1991–2020 climate normals, Key West International Airport (EYW) station
