Leave Seattle around 10:00 AM via I-5 N, then WA-20 W toward Anacortes. The drive is roughly two hours in light traffic, but allow 2½–3 hours on a summer day, especially through Everett and Mount Vernon. Stop for fuel before leaving the interstate, and keep ferry plans in mind: if you are continuing to the terminal, Washington State Ferries recommends arriving 45–60 minutes before a reserved sailing. Park at your lodging in Anacortes first if possible, since downtown and marina parking can fill by midday.
Have a late lunch at Anthony’s Restaurant Anacortes at Cap Sante Marina, ideally around 1:00 PM. Expect about $25–45 per person for seafood, salads, or sandwiches, with broad marina views and a relaxed pace. After lunch, drive a few minutes to Cap Sante Park and take the short uphill walk to the overlook—about 45 minutes is enough for the viewpoint and photos. The panorama over Fidalgo Bay and the nearby islands is especially good in clear afternoon light; wear shoes with decent grip, as the path can be uneven.
Head downtown to the Anacortes Museum & Maritime Heritage Center for about an hour. Check the day’s hours before setting out, as small museums often close in the late afternoon or operate on limited seasonal schedules; admission is generally modest, often around $5–10. From there, drive west to Washington Park, where the scenic loop road and waterfront trails make an easy, unhurried late-afternoon outing. Allow 1½ hours, and bring water—the park is more enjoyable when you pause at the shoreline rather than trying to cover every trail.
Return to downtown for dinner at The Union Tavern, a casual local stop for burgers, salads, and Washington beer. Budget roughly $20–35 per person, and expect a one-hour meal, though waits can stretch during the summer dinner rush. Afterward, take a short stroll along Commercial Avenue or the nearby marina before turning in. If you are driving to the ferry terminal early tomorrow, confirm your vehicle reservation tonight and check the sailing status before bed.
Take a reserved morning Washington State Ferries sailing from the Anacortes Ferry Terminal, arriving 45–60 minutes early for vehicle check-in. The crossing to Friday Harbor takes about 1 hour 25 minutes; fares vary by passenger and vehicle, so confirm the total when booking. Once ashore, follow the signs into town and park in one of the public lots near the waterfront—downtown is compact, and it is easier to leave the car parked for the next few stops. Walk a few minutes to the Friday Harbor Whale Museum, where an hour is enough for the thoughtful exhibits on resident orcas, marine ecology, and conservation. Check the museum’s seasonal hours before sailing; summer admission is generally around $12–15 for adults.
From the museum, stroll through Friday Harbor to Mike’s Café and Wine Bar, a relaxed downtown choice for sandwiches, salads, and a glass of Washington wine. Allow about an hour and budget $20–35 per person. After lunch, walk or drive a few minutes to the San Juan Historical Museum, near downtown. Its collection is spread across historic buildings and gardens, making this a pleasant, unhurried stop rather than a conventional indoor museum; plan on roughly an hour and verify its summer opening schedule, as seasonal hours can be limited.
Pick up the car and drive west across San Juan Island to Lime Kiln Point State Park, allowing roughly 25–30 minutes from town, plus extra time for the narrow, winding roads and summer traffic. The park is best known for its historic lighthouse and shore-based whale-watching outlook; bring binoculars, water, and a Northwest Discovery Pass or day-use payment for parking. Spend about two hours walking the shoreline and checking the water, but treat whale sightings as a bonus rather than a guarantee. Finish with dinner at Duck Soup Inn, near Egg Lake, a short drive away. This intimate, wooded restaurant is a good fit for a slower island evening—reservations are wise in August, and dinner typically runs $50–80 per person before drinks and gratuity.
Start south of Friday Harbor at Pelindaba Lavender Farm, ideally around 9:30 AM. The farm is roughly a 10-minute drive from town, with free parking and about an hour to wander the fragrant fields and shop for lavender oils, soaps, and edible treats. Bloom conditions vary by late August, but the setting is lovely even after peak flowering. From there, drive about 15 minutes to American Camp, following Cattle Point Road; allow an hour and a half for the coastal-prarie trails, overlooks, and the short interpretive stops about the Pig War. Bring water, sunscreen, and a hat—the open grassland has little shade, and wind can make it feel cooler than town.
Return to Friday Harbor for lunch at The Market Chef on Spring Street, where seasonal Northwest dishes and picnic-friendly options make an easy midday stop; budget about $15–30 per person. Hours can vary seasonally, so check the same-day schedule before driving back, and consider taking food to go if the dining room is busy. After lunch, head north for roughly 25 minutes to Roche Harbor Resort. Park near the village and spend about two hours strolling the historic grounds, marina, sculpture garden, and waterfront; resort buildings and shops may keep different hours, but the outdoor areas are enjoyable even when interiors are closed.
For an early dinner, drive a few minutes to Westcott Bay Shellfish Co., a laid-back oyster farm near Roche Harbor. Plan on about 90 minutes and $25–45 per person, with oysters and other shellfish served in a scenic farm setting; arrive earlier rather than later because summer service can sell out or wind down before sunset. Finish back on the east side of the island at Jackson Beach, about a 25-minute drive from Westcott Bay. It is a quieter place to stretch your legs and watch the light fade over the neighboring islands—bring a layer, and check the sunset time before leaving the shellfish farm.
Take a reserved morning Washington State Ferries sailing from the Friday Harbor Terminal to Anacortes. For a vehicle reservation, arrive 45–60 minutes before departure; even walk-ons should be at the terminal early in August. The crossing takes about 1½ hours, and it is worth stepping outside for the views of the islands and Mount Baker when the weather is clear. After landing, drive east and then west on WA-20 toward Deception Pass State Park; display a Washington State Parks Discover Pass if required, and expect limited parking at popular trailheads.
Spend about 1½ hours on Rosario Head Trail, a relatively easy coastal walk through forest and bluff-top scenery. Wear shoes with good grip—the shoreline edges can be uneven, and wind is common even on sunny days. From there, drive a few minutes to Deception Pass Bridge for the classic overlook of the narrow, current-swept channel; allow about 30 minutes, and use the marked viewpoints rather than stopping along the roadway. Continue south on WA-20 and WA-11 into the Skagit Valley for lunch in Bow-Edison, where small farm stands and independent cafés make a much better stop than highway fast food. Budget roughly $15–30 per person and keep some flexibility, since weekday hours at rural eateries can be limited.
After lunch, begin the return via WA-20 east to I-5 south. The drive from the Skagit Valley to Seattle is usually about 1½–2 hours in light traffic, but allow closer to 2½ hours for afternoon congestion around Everett and the north Seattle interchanges. If you are returning a rental car, build in extra time for refueling and the drop-off process; otherwise, this is a good point to make one final coffee or restroom stop before joining I-5. Expect heavier traffic after roughly 3:00 PM, so leaving Bow-Edison by mid-afternoon gives you the best chance of reaching Seattle before the evening rush.