Surf is expected to rise at moderate levels along north and west facing shores of Hawaii this weekend, forecasters said, but a large, northwest swell arriving Tuesday is expected to bump it up to warning levels.

Surf of 5 to 7 feet along north facing shores today rises to 6 to 8 feet on Saturday due to a slow, building northwest pulse. Surf along west facing shores bumps up from 3 to 5 feet today to 6 to 8 feet on Saturday.

Surf along south facing shores remains at 1 to 3 feet, and surf on east-facing shores at 3 to 5 feet, today and Saturday.

Mostly sunny weather is in store for Honolulu today, along with moderate to breezy, northeast trades, which will prevail through the weekend, forecasters said. Scattered showers are expected, mostly for the windward and mauka areas.

Today’s highs range from 78 to 83 degrees, while lows tonight dip to 65. Northeast winds of 15 to 25 mph continue today through tonight.

Forecasters said windward showers are expected to increase tonight into Saturday as a band from a dissipating front moves from north to south over the isles.

Trades may taper off next week as a cold front approaches the state from the northwest.

A small craft advisory remains in place for Maalaea Bay, the Pailolo and Alenuihaha channels and waters south of Hawaii island, due to east to northeast winds of 20 to 25 knots, and higher gusts, through 6 a.m. Saturday.