What to Wear in Honolulu in February

Dress for the water, not the air. NOAA's 1991–2020 normals for Honolulu airport give February the same 80.5°F afternoon as January and 19.5°C at night, with 49mm of rain over about 8 days. Offshore is where it changes. The National Weather Service in Honolulu says the sea bottoms out at 73 or 74°F between late February and March, and NOAA's whale sanctuary puts the usual peak in humpback numbers from January through March, under federal rules that keep boats and swimmers at least 100 yards away. So pack a sleeve for the cooler swim, a jacket for a windy deck in the morning, and one dress for Lunar New Year on Saturday 6 February.

The capsule

1. 
   01

   Jade long-sleeve crew-neck rash guard

   February brings the coolest water of the year: NWS Honolulu puts the sea at 73 or 74°F from late February into March. A long-sleeved rash guard takes the edge off the first minutes in, and it keeps the sun off your back and arms through an hour of snorkelling, which beats an hour of reapplying sunscreen. Flatlock seams lie flat, so nothing rubs as you swim.

2. 
   02

   Deep emerald racer-back one-piece

   Wear it under the rash guard. A racer back sits flat beneath a long sleeve where bikini ties would dig in, a high neck keeps the two layers from gaping when you duck under a wave, and the ribbed knit holds its shape wet. In emerald it reads as a darker jade, so rash guard and swimsuit look like one outfit.

3. 
   03

   Ecru denim jacket, hip length

   For the whale-watch boat. NOAA's sanctuary puts the humpback peak between January and March, and a morning boat leaves while the air is closer to the 19.5°C night than the 27°C afternoon, with wind and spray across the deck. Denim blocks the wind without a hood to catch it and buttons to the collar. At night it goes over the coral slip dress, and ecru keeps it inside a capsule of jade, coral and cream.

4. 
   04

   Coral cowl-neck slip dress, side tie

   Lunar New Year falls on Saturday 6 February, and red is the colour of the day; coral sits in that family without looking like a costume. A cowl neck and a side tie dress it up for dinner, cotton modal packs without creasing, and the denim jacket goes over the thin straps once the evening drops toward 19.5°C. Sunset that Saturday is at about 6:24pm.

5. 
   05

   Ivory mandarin-collar blouse, frog-knot button

   The second evening. February's normal low is 19.5°C, and long ivory sleeves cover your arms at an open-air table without the weight of a jacket. A fitted body tucks cleanly into the satin skirt, gathered cuffs push up when the food arrives, and a stand collar needs no necklace.

6. 
   06

   Jade satin bias-cut midi skirt

   With the ivory blouse, this is the dinner outfit that is not the slip dress. Jade repeats the rash guard, so the capsule reads as three colours rather than eight pieces. A bias cut moves in the trade wind instead of flaring, a midi hem covers your legs through a 19.5°C evening, and an elastic back waist leaves room for dessert.

7. 
   07

   White leather deck shoes

   A whale-watch deck is wet from the first swell. Deck shoes are made for it: a siped rubber sole grips wet fibreglass, rawhide laces cinch without a double knot, and white leather wipes clean of salt. They are the one closed shoe in the capsule, so they are also the pair for Diamond Head, where Hawaiʻi's state parks ask for good walking shoes, and for walking the Great Aloha Run's DoHo 5K on Presidents' Day.

8. 
   08

   Coral nylon zip crossbody

   Keep both hands for the rail when the boat turns toward a blow. A small crossbody worn across the chest holds a phone, sunscreen and a card, water-resistant nylon shrugs off spray, and a zip keeps everything in when the boat rolls. Coral ties it to the slip dress for the evening.

A suggested look — coral cowl-neck slip dress, ecru denim jacket, white leather boat shoes.

What to avoid

• Closer than 100 yards to a humpback — the rule covers boats, swimmers and drones
• A North Shore swim in high surf — Ocean Safety's winter season runs through April
• Oxybenzone sunscreen — Act 104 bars its sale in Hawaiʻi
• A winter coat — the normal February low is 19.5°C
• Diamond Head without a reservation — non-residents need one